endpoint_id arg to Endpoint#create method has incorrect doumentation

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The documentation in https://github.com/googleapis/python-aiplatform/blob/v1.33.0/google/cloud/aiplatform/models.py#L356-L366 states:
```
This value should be 1-10 characters, and valid characters are /[0-9]/. When using HTTP/JSON, this field is populated based on a query string argument, such as ``?endpoint_id=12345``. This is the fallback for fields that are not included in either the URI or the body.
```

It describes only subset of valid values.

#### Environment details

- `google-cloud-aiplatform` version: v1.33.0

#### Steps to reproduce and Code example

Here are my experiments with possible values of endpoint_id.

```python
from google.cloud import aiplatform
project = '...'
location = '...'
endpoint_id = 'experiment-endpoint'
display_name = 'experiment-endpoint-display-name'
endpoint = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# created https://console.cloud.google.com/vertex-ai/locations/.../endpoints/experiment-endpoint?project=...
#%%
endpoint_id = 'experiment_endpoint'
display_name = 'experiment_endpoint-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint2 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# got error 1.Field: endpoint_id; Message: endpoint_id can only contain lowercase letters, digits and hyphens. If the first character is a letter, the last character must be a letter or number and there can be at most 63 characters. If the first character is a number, all characters must be numbers with no leading zeros and there can be at most 10 characters. [field_violations {
# field: "endpoint_id"
# description: "endpoint_id can only contain lowercase letters, digits and hyphens. If the first character is a letter, the last character must be a letter or number and there can be at most 63 characters. If the first character is a number, all characters must be numbers with no leading zeros and there can be at most 10 characters."
# }
# ]
#%%
display_name = 'experiment2_endpoint-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint3 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name
)
# https://console.cloud.google.com/vertex-ai/locations/.../endpoints/8595586081766768640?project=...
#%%
display_name = 'experiment2-endpoint-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint4 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name
)
# https://console.cloud.google.com/vertex-ai/locations/.../endpoints/3652885490727649280?project=...

#%%
endpoint_id = 'experiment3-endpoint'
display_name = 'experiment3-endpoint-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint5 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# https://console.cloud.google.com/vertex-ai/locations/.../endpoints/experiment3-endpoint?project=...
#%%
endpoint_id = 'experiment3-endpoint-very-long-endpoint-id'
display_name = 'experiment3-endpoint-display-name-very-long-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint6 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# https://console.cloud.google.com/vertex-ai/locations/.../endpoints/experiment3-endpoint-very-long-endpoint-id?project=...
#%%
endpoint_id = '7894561234567894561234856789456123456789789456123456789456123456789'
display_name = 'experiment7-endpoint-display-name-very-long-display-name-very-long-display-name-very-long-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint7 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# google.api_core.exceptions.InvalidArgument: 400 List of found errors: 1.Field: endpoint_id; Message: endpoint_id can have at most 63 characters. [field_violations {
# field: "endpoint_id"
# description: "endpoint_id can have at most 63 characters."
# }
# ]
#%%
endpoint_id = '789456123456789456123485678945612345678978945612345678945612345'
display_name = 'experiment7-endpoint-display-name-very-long-display-name-very-long-display-name-very-long-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint8 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# google.api_core.exceptions.InvalidArgument: 400 List of found errors: 1.Field: endpoint_id; Message: endpoint_id can only contain lowercase letters, digits and hyphens. If the first character is a letter, the last character must be a letter or number and there can be at most 63 characters. If the first character is a number, all characters must be numbers with no leading zeros and there can be at most 10 characters. [field_violations {
# field: "endpoint_id"
# description: "endpoint_id can only contain lowercase letters, digits and hyphens. If the first character is a letter, the last character must be a letter or number and there can be at most 63 characters. If the first character is a number, all characters must be numbers with no leading zeros and there can be at most 10 characters."
# }
# ]
#%%
endpoint_id = '7894561234'
display_name = 'experiment7-endpoint-display-name-very-long-display-name-very-long-display-name-very-long-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint9 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# https://console.cloud.google.com/vertex-ai/locations/.../endpoints/7894561234?project=...
#%%
endpoint_id = '3652885490727649285'
display_name = 'experiment8-endpoint-display-name-very-long-display-name-very-long-display-name-very-long-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint10 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# google.api_core.exceptions.InvalidArgument: 400 List of found errors: 1.Field: endpoint_id; Message: endpoint_id can only contain lowercase letters, digits and hyphens. If the first character is a letter, the last character must be a letter or number and there can be at most 63 characters. If the first character is a number, all characters must be numbers with no leading zeros and there can be at most 10 characters. [field_violations {
# field: "endpoint_id"
# description: "endpoint_id can only contain lowercase letters, digits and hyphens. If the first character is a letter, the last character must be a letter or number and there can be at most 63 characters. If the first character is a number, all characters must be numbers with no leading zeros and there can be at most 10 characters."
# }
# ]
#%%
endpoint_id = 'a3652885490727649285b'
display_name = 'experiment8-endpoint-display-name-very-long-display-name-very-long-display-name-very-long-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint11 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# https://console.cloud.google.com/vertex-ai/locations/.../endpoints/a3652885490727649285b?project=...
#%%
endpoint_id = 'experiment3-endpoint-very-long-endpoint-id-very-long-endpoint-id'
display_name = 'experiment3-endpoint-display-name-very-long-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint12 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# google.api_core.exceptions.InvalidArgument: 400 List of found errors: 1.Field: endpoint_id; Message: endpoint_id can have at most 63 characters. [field_violations {
# field: "endpoint_id"
# description: "endpoint_id can have at most 63 characters."
# }
# ]
#%%
endpoint_id = 'experiment3-endpoint-very-long-endpoint-id-very-long-endpoint-i'
display_name = 'experiment3-endpoint-display-name-very-long-display-name'
# if endpoint_id is not None and not endpoint_id_re.match(endpoint_id):
# raise Exception("Endpoint id is invalid")
endpoint13 = aiplatform.Endpoint.create(
project=project, location=location, display_name=display_name, endpoint_id=endpoint_id
)
# https://console.cloud.google.com/vertex-ai/locations/.../endpoints/experiment3-endpoint-very-long-endpoint-id-very-long-endpoint-i?project=...
# Using endpoint [https://...-aiplatform.googleapis.com/]
# ENDPOINT_ID DISPLAY_NAME
# experiment3-endpoint-very-long-endpoint-id-very-long-endpoint-i experiment3-endpoint-display-name-very-long-display-name
# a3652885490727649285b experiment8-endpoint-display-name-very-long-display-name-very-long-display-name-very-long-display-name
# 7894561234 experiment7-endpoint-display-name-very-long-display-name-very-long-display-name-very-long-display-name
# experiment3-endpoint-very-long-endpoint-id experiment3-endpoint-display-name-very-long-display-name
# experiment3-endpoint experiment3-endpoint-display-name
# 3652885490727649280 experiment2-endpoint-display-name
# 8595586081766768640 experiment2_endpoint-display-name
# experiment-endpoint experiment-endpoint-display-name
```

from the code itself you can see which values failed and which did not. Providing the correct allowed values in the documentation would be appreciated