Geo: include `aws:Referer` `Condition` in generated IAM policy

### Is this related to a new or existing framework?

Web Components

### Is this related to a new or existing API?

New API

### Is this related to another service?

Geo

### Describe the feature you'd like to request

Including an [`aws:Referer` `Condition`](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_condition-keys.html#condition-keys-referer) in the generated IAM policy using customer input will help customers control their costs by limiting usage of provisioned maps to web sites that they control.

### Describe the solution you'd like

Sample generated IAM policy:

```json
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "RestrictedMapReadOnly",
"Effect": "Allow",
"Action": "geo:GetMap*",
"Resource": "*",
"Condition": {
"StringLike": {
"aws:Referer": [
"https://example.com/*",
"https://www.example.com/*"
]
}
}
}
]
}
```

Values for the condition would come from the interactive UI.

### Describe alternatives you've considered

n/a

### Additional context

https://stackoverflow.com/questions/68964563/amazon-location-service-authentication/68992509#68992509

### Is this something that you'd be interested in working on?

- [ ] 👋 I may be able to implement this feature request
- [ ] ⚠️ This feature might incur a breaking change