feat(feedback): update frontend for AI summary panel

[vishnupsatish]

Updated based on designs

• Error state was not updated, right now it just hides the box, should we surface an error to the user if there is one?

Loading state:

Too few feedback state:

• Since, for now, there is no way to hide/collapse the box, removed the text that was below what we have now in the designs

[github-actions]

🚨 Warning: This pull request contains Frontend and Backend changes!

It's discouraged to make changes to Sentry's Frontend and Backend in a single pull request. The Frontend and Backend are not atomically deployed. If the changes are interdependent of each other, they must be separated into two pull requests and be made forward or backwards compatible, such that the Backend or Frontend can be safely deployed independently.

Have questions? Please ask in the #discuss-dev-infra channel.

[vishnupsatish]

Surfaced error state to users now, should it use <LoadingError/>? Felt like no because the loading state is now inside the box so removing the box and putting <LoadingError/> would be awkward. And putting <LoadingError/> inside the box would also be awkward.