When selecting a repo for approval, `validated` or `certified`, the collection is copied to the selected repo but also remains in `staging` with the approval button available to select.

Steps to Reproduce

1. Sign a collection
2. Click Approve
3. Repo selection screen appears
4. Select a repository
5. Click Select at the bottom of the screen
6. Exit out of the window

Actual Behavior

Task `pulp_ansible.app.tasks.copy.copy_or_move_and_sign`kicks off after selecting a repository. When this task completes, the collection can be viewed in the selected repo. Going back to the approval-dashboard shows the collection still present in the `staging` repo as well. 

Example: autohubtest2.collection_dep_a_psaqiytz:1.0.0 is in both `validated` and `staging`. 

https://console.stage.redhat.com/ansible/automation-hub/repo/staging/autohubtest2/collection_dep_a_psaqiytz/?version=1.0.0

https://console.stage.redhat.com/ansible/automation-hub/repo/validated/autohubtest2/collection_dep_a_psaqiytz/?version=1.0.0

Expected Behavior

After the `pulp_ansible.app.tasks.copy.copy_or_move_and_sign`task completes, the collection should only be present in the selected repo and removed from staging.