Draft: Add Title filter to Issues search

What does this MR do and why?

Fixes #25046 (closed)

Decoupled from !86825 (closed)

This MR adds a new Title filter for issues.

This should significantly improve searching for issues on gitlab.com which has lots of them and sometimes results in 500s.

Screenshots or screen recordings

Screen_Recording_2022-05-07_at_01.00.15

Caveats

Multi-word search is possible if you wrap your text within quotes.

Click to expand

How to set up and validate locally

1. Open project issues
2. Click on search bar
3. Select Title and enter some text

The filter should find issues only containing that text in the title.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.