This change add the RPC ACL binding rule handlers. These handlers
are responsible for the creation, updating, reading, and deletion
of binding rules.
The write handlers are feature gated so that they can only be used
when all federated servers are running the required version.
The HTTP API handlers and API SDK have also been added where
required. This allows the endpoints to be called from the API by users
and clients.
Currently CRUD code that operates on SSO auth methods does not return created or updated object upon creation/update. This is bad UX and inconsistent behavior compared to other ACL objects like roles, policies or tokens.
This PR fixes it.
Relates to #13120
Making the ACL Role listing return object a stub future-proofs the
endpoint. In the event the role object grows, we are not bound by
having to return all fields within the list endpoint or change the
signature of the endpoint to reduce the list return size.
