[FEATURE REQ] mgmt, support convenience API for publicNetworkAccess

[weidongxu-microsoft]

PR as example
https://github.com/Azure/azure-sdk-for-java/pull/39309/files

• StorageAccount
• CosmosDBAccount
• KubernetesCluster
• RedisCache
• WebApp

1. the inner model should have properties.publicNetworkAccess
2. use the PublicNetworkAccess enum as response of the getter

Let me know if either of them does not apply.

Note

1. no need to update PrivateLinkTests, we can update it after all complete
2. one PR per module

[weidongxu-microsoft]

@v-hongli1

Could you check if there is other class in premium libs that also need this support?

If no, you can close the issue.

[weidongxu-microsoft]

Please search publicNetworkAccess() filter file *Inner.java.

See if it correlate to any handwritten class (usually a class without the Inner suffix) that not handled above.