Ability to customize template for automatically created MR

Problem to solve

As a developer, when I create MR directly from issue, the MR description contains closes #<issue_id>. However, in our development flow after the MR is merged, we would rather add label to the issue.

Further details

It is possible to add merge request templates for MR created manually, but not automatically.

Proposal

Add support for .gitlab/merge_requests_templates/mr_from_issue_default.md

Links / references