Remove unused eTag param from getState()

[artursouza]

Expected Behavior

eTag is not used by Dapr runtime in getState() only delete.

Actual Behavior

eTag is handled in the SDK for GeState in HTTP, not in GRPC - after all is ignored in runtime.

Steps to Reproduce the Problem

Use getState() with eTag, using different values and see how it is ignored.

Release Note

RELEASE NOTE: REMOVED unused etag param from getState()