Values:
STATE_UNSPECIFIED (0):
Not specified. Invalid state.
ACTIVE (1):
Function has been successfully deployed and
is serving.
FAILED (2):
Function deployment failed and the function
is not serving.
DEPLOYING (3):
Function is being created or updated.
DELETING (4):
Function is being deleted.
UNKNOWN (5):
Function deployment failed and the function
serving state is undefined. The function should
be updated or deleted to move it out of this
state.
