Merge pull request #27178 from pritha-srivastava/wip-rgw-iam

rgw: Adding 'iam' namespace for Role and User Policy related REST APIs.

Reviewed-by: Adam C. Emerson <aemerson@redhat.com>
Reviewed-by: Matt Benjamin <mbenjamin@redhat.com>

diff --cc src/common/options.cc
Simple merge

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

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

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

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

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

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

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

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

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

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