azwi cannot work in sovereign cloud

**Describe the bug**
Cannot use azwi in sovereign cloud

**Steps To Reproduce**
$ azwi version
Version: v0.13.0
GitCommit: 46c5137
$ azwi serviceaccount create phase app --aad-application-name "${APPLICATION_NAME}" --azure-env --debug
INFO[0000] No subscription provided, using selected subscription from Azure CLI: <>
DEBU[0000] Resolving tenantID for subscriptionID: <>
DEBU[0001] Getting application with display name=<>
Error: failed to run phase aad-application: failed to get AAD application: code: InvalidAuthenticationToken, message: Access token validation failure. Invalid audience.

**Expected behavior**
it should work well as global cloud

**Logs**

**Environment**

**Additional context**

Start by reproducing the reported `azwi serviceaccount create` command with `--azure-env` set to a sovereign cloud and review the debug output around AAD application lookup. Trace how azwi selects the cloud and obtains the access token. Done means the same service-account creation flow works in a sovereign cloud without the Invalid audience error.

Written by the indexing model from the issue text.