Health status not filter

What does this MR do and why?

Adds the != filter to the issue list and board search for Health Status.

Issue: #378460 (closed)

Screenshots or screen recordings

Issue list	Issue board

How to set up and validate locally

1. Go to the project's Issue List or Boards
2. Make sure you have issues with a health status to test
3. In the filtered search bar, filter down for Health = and/or Health !=

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.