Follow-up from "Admin runner filtering by version"

The following discussion from !118829 (merged) should be addressed:

• @vshushlin started a discussion:

  Suggestion/non-blocking: can we add requests tests instead of the resolver ones in https://gitlab.com/gitlab-org/gitlab/-/blob/a67fd2ea7996389924674163606530d77212788e/spec/requests/api/graphql/ci/runners_spec.rb#L4-4 ?

  This can be moved to the follow-up.