RGW: Getting an RGW service Segfault when assigning an attribute to an IAM role

RGW: Getting an RGW service Segfault when assigning an attribute to an IAM role

The current implementation of RGWTagRole, which inherits RGWRestRole::verify_permission() from its base class, encounters a critical issue when loading RGWRole from storage and initializing the RGWRestRole::_role member variable.To address this issue and ensure that errors in initialization are appropriately handled, it is proposed to separate the initialization logic from the permission-checking logic.

Fixes: https://tracker.ceph.com/issues/64232
Signed-off-by: Shreyansh Sancheti <ssanchet@redhat.com>