Also, fixes broken specs

- Keep 'Deploy Section' open upon save, otherwise the token might get
  lost
- When an error appears, display the error inside the form and also keep
  the Deploy Section open
- Changue copy of revoke modal

Includes:
- Model, factories, create service and controller actions
- As usual, includes specs for everything
- Builds UI (copy from PAT)
- Add revoke action

Closes #31591

also added an #open_branches private method

Also fixed the deploy_keys view and moved the code from the repository_helper
to the repository_controller

Added specs for the deploy_keys_presenter and added a new method in the presenter
called #key_available?

Fixed some minor UX inconsistencies and added a concern to handle
redirection

Added a test for the integrations controller