rgw/logging: fixes data loss during rollover

rgw/logging: fixes data loss during rollover

Multiple threads attempting to roll over the same log object can result
in the creation of numerous orphan tail objects, each with a single record.
This occurs when a NULL RGWObjVersionTracker is used during the creation of
a new logging object. These records are inaccessible, leading to data loss,
which is particularly critical in Journal mode.
Furthermore, valid log tail objects may be added to the Garbage Collection (GC)
list, exacerbating data loss.

Fixes: https://tracker.ceph.com/issues/72740
Signed-off-by: N Balachandran <nithya.balachandran@ibm.com>