CI: bring back mr-settings check
Add the check again that ensures we can write to the target repository. This is needed for our merge style, we add the MR-ID to the title of the commit message, and may do small fixups while merging.
Add the check again that ensures we can write to the target repository. This is needed for our merge style, we add the MR-ID to the title of the commit message, and may do small fixups while merging.