Bump version to 9.2.0

• Diff: https://gitlab.com/gitlab-org/gitlab-qa/compare/v9.1.2...3fd06b120c288ad7da4f7126670721af01c7a2bb

• Release notes:

### New scenarios and scenario updates

- !1148 Add scenario for GitHub OAuth.
- !1142 Improvements for Test::Integration::Import scenario type

### Fixes

- !1141 Update gitlab_spec to reduce brittleness.
- !1132 Prevent spam creation of failure issues
- !1151 Include ee in spec path

### Doc changes

- !1147 Update readme with foss links.

### Other changes (CI, backstage)

- !1139 Disable protected env check for schema load task.
- !1146 Remove superseded update job type
- !1145 Populate bundle cache on e2e runners and some improvements
- !1143 Remove package-and-test pipeline setup
- !1144 Fix default ci pipeline rule

• 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.