Add parameterization to OAuth2 to support URL substitution

### Clear and concise description of the problem

In order to authenticate with Firebase and other Google Services, you need to use OAuth, which is tied to a specific project, for example the following using cURL. Guide for authentication is [here](https://cloud.google.com/docs/authentication/rest)

```bash
curl -X GET \
-H "Authorization: Bearer $(gcloud auth application-default print-access-token)" \
"https://cloudresourcemanager.googleapis.com/v3/projects/PROJECT_ID"
```

We cannot specify this today for example using TypeSpec and parameterizing the `PROJECT_ID` for example where it is required, see the [send method documentation](https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages/send)

```typespec
import "@typespec/http";

using TypeSpec.Http;

@service({
title: "Firebase Cloud Messaging API",
})
@server("https://fcm.googleapis.com/v1/{PROJECT_ID}", "FCM Endpoint", {
"PROJECT_ID": string;
})
@useAuth(FirebaseOAuth)

namespace FCM;

alias FirebaseOAuth = OAuth2Auth<[{
type: OAuth2FlowType.implicit;
authorizationUrl: "https://cloudresourcemanager.googleapis.com/v3/projects/{PROJECT_ID}";
}], [
"https://www.googleapis.com/auth/firebase.messaging",
"https://www.googleapis.com/auth/cloud-platform"
]>;
```

### Checklist

- [X] Follow our [Code of Conduct](https://github.com/microsoft/typespec/blob/main/CODE_OF_CONDUCT.md)
- [X] Read the [docs](https://typespec.io/docs/).
- [X] Check that there isn't already an issue that request the same feature to avoid creating a duplicate.