rados: Set snappy as default value in ms_osd_compression_algorithm instead of list...

rados: Set snappy as default value in ms_osd_compression_algorithm instead of list of algorithms.

The OSDs choose the preferred algorithm based on mutual understanding between OSDs. The proposed solution to this problem was to set "snappy" as default algorithm and provide flexibility to user to change the algorithm of their choice.

Fixes: https://tracker.ceph.com/issues/58410
Signed-off-by: shreyanshjain7174 <ssanchet@redhat.com>
(cherry picked from commit 158986a3b73a42db8e31f3366912e906c743f145)