Search should compare only the lowercase versions of the project names

What does this MR do?

This PR turns both the database value that's being compared with and the one coming from the api to lower case letters. So that they will match, even if one was cased differently.

Are there points in the code the reviewer needs to double check?

First time contributor here, so yeah, please double check. But the code should be pretty straight forward.

Why was this MR needed?

GitLab integrations like LabCoat before this PR need to exactly know the casing to find projects. See: https://gitlab.com/Commit451/LabCoat/issues/211

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Documentation created/updated
• Tests
  • Added for this feature/bug (I'm not sure how to test this in a sane way)
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Semi related #13253 (moved)