Fix SAST on the 12-2-stable-ee branch

What does this MR do?

We've observed the sast job is broken on the 12-2-stable-ee branch. We need this to be green for new patch releases.

The underlying problem is #32344 (closed) and a fix for it is in gitlab-org/security-products/sast!156 (merged) , but it's not entirely obvious to me that this fix will filter down to the stable branches. Maybe it will, but I'm not sure what the timescale for that will be even if so.

If this fix works, we should see https://gitlab.com/gitlab-org/gitlab/-/jobs/302270387 is red, while https://gitlab.com/gitlab-org/gitlab/-/jobs/302272048 is green.

We'll need a similar MR for 12.1 as well.