Update gitlab-qa gem version

Diff: https://gitlab.com/gitlab-org/gitlab-qa/compare/v7.17.0...d621364b65c652ed79b72853b4f81c9766c3aeec

Release notes

Other changes (CI, backstage)

• https://gitlab.com/gitlab-org/gitlab-qa/-/merge_requests/815+
• https://gitlab.com/gitlab-org/gitlab-qa/-/merge_requests/817+
• https://gitlab.com/gitlab-org/gitlab-qa/-/merge_requests/818+

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.