Merge pull request #42054 from tchaikov/wip-os-xattrs

os: use transparent comparator in ObjectStore::getattrs()

Reviewed-by: Radoslaw Zarzynski <rzarzyns@redhat.com>
Reviewed-by: Chunmei Liu <chunmei.liu@intel.com>
Reviewed-by: Ronen Friedman <rfriedma@redhat.com>

diff --cc src/os/bluestore/BlueStore.cc
Simple merge

diff --cc src/osdc/Objecter.h
Simple merge