Merge pull request #43597 from pritha-srivastava/wip-rgw-sts-role-multisite

rgw multisite: replicate metadata for iam roles

Reviewed-by: Casey Bodley <cbodley@redhat.com>

diff --cc src/rgw/CMakeLists.txt
Simple merge

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

diff --cc src/rgw/rgw_auth_s3.h
Simple merge

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

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

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

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