Dotted `only` and `exclude` not addressable for nested Tuples

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Can't address Nested Fields in Tuples:

```
from marshmallow import fields, Schema

class Child(Schema):
name = fields.String()
age = fields.Integer()

class Friend(Schema):
name = fields.String()
height = fields.Integer()

class Family(Schema):
kidsandfriends = fields.Tuple((fields.Nested(Child), fields.Nested(Friend)))

print(
Family(only=['kidsandfriends.name',]).dump({'kidsandfriends':({"name": "steve", "age": 0},{"name": "steve", "height":2})})
)
```
result:
```
{'kidsandfriends': ({'name': 'steve', 'age': 0}, {'height': 2, 'name': 'steve'})}
```

expected:

```
{'kidsandfriends': ({'name': 'steve'}, {'name': 'steve'})}
```

Documentation only gives me:
> Nested fields can be represented with dot delimiters.
No known Notation of dotted adressing a touple (`kidsandfriends.0.name` , `kidsandfriends.().name`, etc) gives any Result

Start by running the provided Family, Child, and Friend schema reproducer and inspect how dotted only/exclude paths are handled for fields.Tuple containing Nested fields. Define and test a supported path notation for tuple members, with done indicated by the expected output excluding age and height.

Written by the indexing model from the issue text.