Update Related Issues app UI text to be context aware

What does this MR do and why?

This MR updates components within app/assets/javascripts/related_issues to use UI text to be aware of issuableType.

Screenshots or screen recordings

This MR doesn't cause any visual impact.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

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.

Related to #352004 (closed)