Backport EE changes made to the scripts/ directory

What does this MR do?

This backport changes made by EE to the files in the scripts/ directory. This comes with a few changes to some scripts to make them work in the single codebase setup.

EE MR: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14778

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content