Add `needs` to the following 4 jobs to run earlier

We still have 4 jobs which will only run after Fixtures stage finished, but they can really run earlier:

• gitlab_git_test
• lint-ci-gitlab
• memory-on-boot
• memory-static

The following discussion from !24568 (merged) should be addressed:

• @caalberts started a discussion: (+9 comments)

  @godfat Could you do maintainer review + merge please?