Apply codeowner validation when creating/updating a blob in the UI
requested to merge 217830-insert-gitlab-codeowners-validationservice-into-file-webide-merge-routine into master
What does this MR do?
When attempting to update a file via the file edit interface, confirm that codeowner rules won't apply to the updated file before committing the change; if they do apply, refuse the action and display the codeowners error message.
Edited by Yorick Peterse