Prevent failure of runner tag spec in PG11

The following discussion from !90045 (merged) should be addressed:

• @OmarQunsulGitlab started a discussion: (+4 comments)

  @mrincon can you help me understand where these tags come from? is it from some API?

  For some super weird reason, this test keeps failing with PostgreSQL 11 on my MR that should have nothing wrong with this part of the code https://gitlab.com/gitlab-org/gitlab/-/jobs/2720762563 I also ran the tests on my localhost using PostgreSQL 11 as well, and the same test failed on master, which confuses me even more!