To support extended update red hat repositories, we must add them to our backend, snapshot them, and allow the user to view them

Should include EUS end E4S repos for RHEL 8, 9, and 10

There will need to be two new columns on the repository configurations table:

• extended_release: eus or e4s
• extended_release_version: 9.2, 9.4, etc.

Add the extended support repositories to our snapshotted red hat repos

• The URLs look something like: https://cdn.redhat.com/content/eus/rhel9/9.2/x86_64/appstream/os/
• Use the admin tasks feature list to help

Add extended support repos to the list/fetch API:

• listing and fetching should check if the user has access to the feature name
• should be filterable
  • /repositories/?extended_release=eus/e4s
  • /repositories/?extended_release_version=9.2/9.4/9.6