Values:
UNSPECIFIED (0):
No channel specified.
RAPID (1):
RAPID channel is offered on an early access
basis for customers who want to test new
releases.
WARNING: Versions available in the RAPID Channel
may be subject to unresolved issues with no
known workaround and are not subject to any
SLAs.
REGULAR (2):
Clusters subscribed to REGULAR receive
versions that are considered GA quality. REGULAR
is intended for production users who want to
take advantage of new features.
STABLE (3):
Clusters subscribed to STABLE receive
versions that are known to be stable and
reliable in production.