KeyRevocationActionType of the instance. Supported options
are "STOP" and "NONE". The default value is "NONE" if it is not
specified.
Values:
UNDEFINED_KEY_REVOCATION_ACTION_TYPE (0):
A value indicating that the enum field is not
set.
KEY_REVOCATION_ACTION_TYPE_UNSPECIFIED (467110106):
Default value. This value is unused.
NONE (2402104):
Indicates user chose no operation.
STOP (2555906):
Indicates user chose to opt for VM shutdown
on key revocation.