Fixes #36803 - Smart Proxy content repair

[sjha4]

What are the changes introduced in this pull request?

Implements "Verify checksum" or repair task for capsules

Considerations taken when implementing this change?

What are the testing steps for this pull request?

On the UI > capsule > click on sync dropdown and select Verify Checksum You should see a task starting and calling the Pulp -> Repair task on the capsule.

[sjha4]

[test katello]

[sjha4]

Closing this in favor of https://github.com/Katello/katello/pull/10932 which has these changes along with additional commits to support granular repairs.