rgw: require zonegroup feature to compress encrypted objects

rgw: require zonegroup feature to compress encrypted objects

Reef adds support for combining server-side encryption and compression,
but previous releases would not replicate such objects correctly. gate
the feature behind a zonegroup feature flag to require that all zones
upgrade to reef before enabling. this feature is not enabled by default
in new zonegroups

Fixes: https://tracker.ceph.com/issues/57905
Signed-off-by: Casey Bodley <cbodley@redhat.com>
(cherry picked from commit 4bc52954ab7b38a8eac50c116196d6db728cee00)

Conflicts:
	src/rgw/rgw_op.cc: SiteConfig -> sal::ZoneGroup::supports