Merge pull request #55259 from linuxbox2/wip-object-attributes

rgw: implement GetObjectAttributes

diff --cc src/rgw/driver/rados/rgw_sal_rados.cc
Simple merge

diff --cc src/rgw/driver/rados/rgw_sal_rados.h
Simple merge

diff --cc src/rgw/rgw_op.cc
Simple merge

diff --cc src/rgw/rgw_op.h
Simple merge

diff --cc src/rgw/rgw_rest_s3.cc
Simple merge

diff --cc src/rgw/rgw_sal.h
Simple merge

diff --cc src/rgw/rgw_sal_dbstore.cc
Simple merge

diff --cc src/rgw/rgw_sal_dbstore.h
Simple merge

diff --cc src/rgw/rgw_sal_filter.h
Simple merge