Extended user feedback mechanism

What does this MR do and why?

The MR updates the User Feedback mechanism, extending it to include more useful information.

Screenshots or screen recordings

Before	After

State
Default
User click the link -> User Feedback modal is shown
User Feedback modal gets filled out
User Feedback is submitted -> modal is dismissed

How to set up and validate locally

1. Set up the chat: https://docs.gitlab.com/ee/development/ai_features.html#set-up-gitlab-duo-chat

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 #418794 (closed)