Bump version 7.32.0

• Diff: v7.31.0...816aa543

• Release notes:

### New scenarios and scenario updates

- !979 Add step to force update user's highest role in seeding script.

### Other changes (CI, backstage)

- !978 Cast message_lines in exception to Array
- !975 Output logger Date with better formatting

• 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.