Merge branch 'ml-remove-reusable-test-setup' into 'master'

Remove reusable test setup

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/104035



Merged-by: Dan Davison <ddavison@gitlab.com>
Approved-by: Will Meek <wmeek@gitlab.com>
Approved-by: Dan Davison <ddavison@gitlab.com>
Co-authored-by: Mark Lapierre <mlapierre@gitlab.com>