Added link to commit in commited changes banner

What does this MR do and why?

#404691 (closed)

Added link to commit in the committed changes banner

Screenshots or screen recordings

Screen_Recording_2023-10-24_at_12.44.15

How to set up and validate locally

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

1. Inside a project, create a MR with a few changes
2. In the diffs tab, select a file and edit it in the single file editor
3. Commit the changes and click on the changes link that the banner displays

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.