[Feature] EnableOIDCIssuerPreview flag for AzureChinaCloud

[ekhaydarov]

Is your feature request related to a problem? Please describe. Cannot use workload identity in china cloud without this feature

Describe the solution you'd like Have this flag be enabled in the AzureChinaCloud

Describe alternatives you've considered There are no alternatives

Additional context Add any other context or screenshots about the feature request here.