Insert CodeOwners::ValidationService checks into file edit :delete action

Following the logic applied in !32341 (merged), additionally add these checks to the :delete action (!32341 (comment 345620651))

Testing Activity

@fjsanpedro :

  • Test the situation that we delete a blob and get the codeowner approval error

MR Breakdown

@fjsanpedro :

  • The change is very easy, we just need to add the delete action to the existing check in the BlobsController. Nevertheless, because the delete action is made by a modal, we should check how the UI looks when the error is raised.
Edited by Darva Satcher