Values:
STATE_UNSPECIFIED (0):
The default value. This value is used if the
state is omitted.
INACTIVE (1):
The Instance has not been initialized or has
been deleted.
CREATING (2):
The Instance is being created.
ACTIVE (3):
The Instance has been created and is ready
for use.
UPDATING (4):
The Instance is being updated.
DELETING (5):
The Instance is being deleted.
FAILED (6):
The Instance encountered an error during a
state change.
