Pam Artiaga authored Dec 10, 2023 and Thong Kuah committed Dec 10, 2023

The group and project objects are called in a `prepend_before_action`
so that they are fetched before the authorization checks
(e.g.: authorize_admin_cluster, authorize_update_cluster).

However, this results in a bug because fetching the group or project
requires the session to be loaded already, and `prepend_before_action`
calls happen before the session is loaded.

To resolve the problem, we will instead load the group or project
object in the very first `before_action` in the ClustersController
call stack.

Changelog: fixed