Values:
STATE_UNSPECIFIED (0):
State is not specified.
STARTING (1):
The compute layer is starting the runtime. It
is not ready for use.
PROVISIONING (2):
The compute layer is installing required
frameworks and registering the runtime with
notebook proxy. It cannot be used.
ACTIVE (3):
The runtime is currently running. It is ready
for use.
STOPPING (4):
The control logic is stopping the runtime. It
cannot be used.
STOPPED (5):
The runtime is stopped. It cannot be used.
DELETING (6):
The runtime is being deleted. It cannot be
used.
UPGRADING (7):
The runtime is upgrading. It cannot be used.
INITIALIZING (8):
The runtime is being created and set up. It
is not ready for use.
