Resolve "Consider grouping all static analysis jobs into a single one"

EE MR: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1738

What does this MR do?

This runs all the static analysis tasks in a single job, gather the failing ones, print their output at the end and exits with 1 if there's any.

Why was this MR needed?

Because we're wasting money spinning up runners for jobs that take a few seconds to run.

What are the relevant issue numbers?

Closes #31463 (closed)