* API: Add reqSignedIn to router groups
* AuthN: Add fall through in context handler
* AuthN: Add IsAnonymous field
* AuthN: add priority to context aware clients
* ContextHandler: Add comment
* AuthN: Add a simple priority queue
* AuthN: Add Name to client interface
* AuthN: register clients with function
* AuthN: update mock and fake to implement interface
* AuthN: rewrite test without reflection
* AuthN: add comment
* AuthN: fix queue insert
* AuthN: rewrite tests
* AuthN: make the queue generic so we can reuse it for hooks
* ContextHandler: Add fixme for auth headers
* AuthN: remove unused variable
* AuthN: use multierror
* AuthN: write proper tests for queue
* AuthN: Add queue item that can store the value and priority
Co-authored-by: Jo <joao.guerreiro@grafana.com>
