Reset the branch state due to improper import.
RHEL git ref that the branch was reset to
<8f03c99f75693fc49f7edd264b7d807fa9c61282>.
Summar of the updates:
* `.gitignore`
Restore looser rules for matching.
* `.gitlab/merge_request_templates/default.md`
Merge Request template file is picked up only from the main branch.
Therefore not needed for this branch.
* `ruby.rpmlintrc`
Was never present for the Ruby 2.5 module.
* `*.patch`
Delete patches wrongly imported from another repository.
* `gating.yaml`
Was never present for the Ruby 2.5 module.
Related: rhbz#2210326
