[ProtoCleanup]Evaluate worker_metadata and capabilities properties can be removed safely from WorkerInitResponse

[kshyju]

This is a clean up item.

Evaluate worker_metadata and capabilities properties can be removed safely from WorkerInitResponse. Check with all language workers to ensure everything works after this change.

Background:

worker_metadata and capabilities were added to FunctionEnvironmentReloadResponse in Azure/azure-functions-language-worker-protobuf#90. So today, these properties exists in both WorkerInitResponse and FunctionEnvironmentReloadResponse . In placeholder scenario, the capabilities and worker metadata will not be available until specialization is done (env reload request).

[kshyju]

We need this property in both worker init response and env reload response to support placeholder hit & miss use cases.

Closing.