This adds the configured backend quota bytes to the endpoint status response.
related discussion in #17821
Signed-off-by: Thomas Jungblut <tjungblu@redhat.com>
When performing the downgrade operation, users can confirm whether each member
is ready to be downgraded using the field 'storageVersion'. If it's equal to the
'target version' in the downgrade command, then it's ready to be downgraded;
otherwise, the etcd member is still in progress of processing the db file.