Add group check for cluster-admin

[lucferbux]

Description

Fixes #464

How Has This Been Tested?

1. Create a new group
2. Add a cluster-admin rolebinding
3. Add a user to that group
4. The user should have cluster-admin roles
5. Log in to the dashboard
6. The user should have cluster-admin permission in the dashboard

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[andrewballantyne]

LGTM

Ran the following tests:

• Added a new user with no permissions
• Did a before your PR test on main
  • Group of me, was not granted admin access
  • User of me, was granted admin access
• Did a on your PR test
  • Group of me, was granted access
  • User of me, was granted access
  • Group of not me, was not granted access

All along I could, being part of the group or directly the user, have no permissions issues fetching items locally (until I was no longer a cluster admin -- in the last bullet).

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andrewballantyne

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