Bump version to 7.23.0

• Diff: v7.22.1...769d8c75

• Release notes:

### Fixes

- !858 Stub QA_RUN_TYPE environment variable so it's not picked up if exists
- !854 Stub environment for test session spec
- !792 Use latest tag on minio after fix

### Other changes (CI, backstage)

- !859 Add link to grafana to test session report

• Checklist before merging:

  • Diff link is up-to-date.
  • Based on the diff, lib/gitlab/qa/version.rb is updated, according to SemVer.
  • Release notes are accurate.

• Checklist after merging:

  • Update the release notes for the newly created tag.