fix(credential): fix credential issue on CN tenant

[z30yserr]

Fix credential issue on CN azure context

This PR solves authentication issue on a chinese tenant. Following this issue.

As of now, when you try to use octodns on a CN context you will end up with this error :

octo-sync --config-file=public-file.yaml
ERROR: AADSTS500011: The resource principal named https://management.azure.com was not found in the tenant named

octo-sync --config-file=private-file.yaml
azure.core.exceptions.ClientAuthenticationError: Authentication failed: AADSTS500011: The resource principal named https://management.azure.com was not found in the tenant named

even though on both files, the following settings have been applied :

authority: https://login.partner.microsoftonline.cn
base_url: https://management.chinacloudapi.cn

After the fix, both synchronization are working properly.

2025-05-19T09:20:40  [264762031934928] DEBUG msal.token_cache event={
    "client_id": "REDACTED",
    "data": {
        "claims": null,
        "scope": [
            "https://management.chinacloudapi.cn/.default"
        ]
    },
    "environment": "login.partner.microsoftonline.cn",
    "grant_type": "client_credentials",
    "params": null,
    "response": {
        "access_token": "********",
        "expires_in": 3599,
        "ext_expires_in": 3599,
        "token_type": "Bearer"
    },
    "scope": [
        "https://management.chinacloudapi.cn/.default"
    ],
    "token_endpoint": "https://login.partner.microsoftonline.cn/REDACTED/oauth2/v2.0/token"
}
2025-05-19T09:20:40  [264762031934928] INFO  azure.identity._internal.get_token_mixin ClientSecretCredential.get_token_info succeeded

[ross]

Tested locally with my personal azure setup. Thanks.

[ross]

/cc Fixes #102