AzureActiveDirectory (AAD) custom auth provider is broken in 2.0.3

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**Describe the bug**
AAD sign-in either works locally or remotely, depending on the format of the `openIdIssuer` url in the `staticwebapp.config.json`, but never in both environments.

In `staticwebapp.config.json`
This works locally
```json
{
"openIdIssuer": "https://login.microsoftonline.com//oauth2/v2.0",
}
```
But when deployment, I get ERR_TOO_MANY_REDIRECTS in the browser.

This works when deployed
```json
{
"openIdIssuer": "https://login.microsoftonline.com//v2.0",
}
```
But in local emulator, I get 404 - This login.microsoftonline.com page can't be found

**To Reproduce**
Steps to reproduce the behavior:

To reproduce this, you would have to set up an Azure tenant with an AAD app in it. Here is my full `staticwebapp.config.json` for reference

```json
{
"platform": {
"apiRuntime": "node:20"
},
"auth": {
"identityProviders": {
"azureActiveDirectory": {
"registration": {
"openIdIssuer": "https://login.microsoftonline.com/***********************************/v2.0",
"clientIdSettingName": "AAD_CLIENT_ID",
"clientSecretSettingName": "AZURE_CLIENT_SECRET_APP_SETTING_NAME"
}
}
}
},
"routes": [
{
"route": "/*",
"allowedRoles": [
"authenticated"
]
}
],
"responseOverrides": {
"401": {
"statusCode": 302,
"redirect": "/.auth/login/aad"
}
}
}
```

**Expected behavior**
Clear guidance on whether to include `oauth2` in the URL and a consistent behavior between local and deployed environments.

**Screenshots**

**Desktop (please complete the following information):**

- OS: Windows 11
- Edge: Version 134.0.3124.72 (Official build) (64-bit)

**Additional context**
The documentation site says we should not use `oauth2` in the url, but I have consulted with a library maintainer who said the documentation site is outdated.

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