Bump version to 7.24.6

• Diff: https://gitlab.com/gitlab-org/gitlab-qa/compare/v7.24.5...05adaed36942b347ba8e04d69b1d7f969391f828

• Release notes:

### Other changes (CI, backstage)

- !889 Use more default rules from `gitlab-dangerfiles`.
- !890 Parallelise packages scenario.
- !892 Remove unique identifiers when matching failures

• 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.