fix(comments): register event listener for typed comment events

[miaulalala]

Summary

Since the typed comment events (CommentAddedEvent, CommentUpdatedEvent, etc.) were introduced in NC34, dispatchTyped() dispatches using the exact subclass name. Registering only for CommentsEvent::class means the listener never fires, so comment mention notifications are never created or cleared.

Change introduced in #56076

AI-Assisted-By: Claude Sonnet 4.6 noreply@anthropic.com

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

AI (if applicable)

• The content of this PR was partly or fully generated using AI

[miaulalala]

/backport to stable33

[janepie]

Creating bell notifications works, clearance seems to not work, neither in the notification list nor the bubble in the file list

[CarlSchwan]

And a followup #60137

[miaulalala]

Creating bell notifications works, clearance seems to not work, neither in the notification list nor the bubble in the file list

that is fixed in the follow up PR #59918

[nickvergessen]

clearance seems to not work, neither in the notification list nor the bubble in the file list

It used to work as there was a link to go to the comment from the full subject, but since the subject contains mention chip and a file link by now, the subject is no longer linked.