Add action-on-reliability-report job
Part of gitlab-org/quality/quality-engineering/team-tasks#1918 (closed) (OKR) This MR:
- Add action-on-reliability-report job that uses
gitlab_quality-test_tooling
to create MRs based on the json files created by the reliability report. - Also switch to checking out gitlab code in test-reliability-report
Changelog: added