Enumerates the possible states that the creation request can
be in.
Values:
STATE_UNSPECIFIED (0):
Invalid.
RUNNING (1):
Request is being processed.
SUCCEEDED (2):
The glossary was successfully deleted.
FAILED (3):
Failed to delete the glossary.
CANCELLING (4):
Request is in the process of being canceled
after caller invoked
longrunning.Operations.CancelOperation on the
request id.
CANCELLED (5):
The glossary deletion request was
successfully canceled.