Revert better-error-messages-for-pull-mirroring

What does this MR do and why?

Revert "Merge branch '419642-better-error-messages-for-pull-mirroring' into 'master'"

This reverts merge request !132854 (merged)

#428649 (comment 1612867121) mentions that the bug is present in the 16.5 release and the revert in master was not made in time to be included in 16.5.