Rename Replies to Comments
The following discussion from !165005 should be addressed:
- [ ] @slashmanov [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/165005#note_2093104335): (+4 comments)
> Also, we now have a discrepancy between the used terms. We can collapse full threads or we can collapse replies to the threads. But the user always sees 'replies' mentioned. That means if we collapse a full thread with no comments the message will say: '1 reply', while in reality there are no replies in that thread.
>
> I think to avoid that confusion we should always use the term 'comments'.
>
> This also aligns with the global toggle for threads and thread comments.
issue