Bump version 7.22.0

• Diff: v7.21.1...a7f8a439

• Release notes:

### New scenarios and scenario updates

- !824 Add Integrations Scenario and Job.

### Doc changes

- !848 Update gitlab-qa docs.

### Other changes (CI, backstage)

- !849 Update test case run graphs to all environments.

• 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.