Add ability to `Add comment now` in middle of a review when editing a pending comment
From [feedback issue](https://gitlab.com/gitlab-org/gitlab/-/issues/368799#note_1048213625)
#### Issue
We removed the option to `Add comment now` on every single pending comment to reduce information overload. However, sometimes a user may add a comment to a review and then realize they want to "add comment now." At this time, you can no longer do that.
#### Proposal
##### Editing a comment
- Add option to `Add comment now`
| Current | Proposed |
| ------ | ------ |
|  |  |
##### [Editing threaded comment (with resolve option)](https://gitlab.com/gitlab-org/gitlab/-/issues/250660)
- Remove `Comment and resolve thread` (I'm not sure it's working as intended anyway :thinking:)
- Add `Add comment now`
- Include `Resolve thread` checkbox (which should retain previous selection; ie if user selected `Resolve` when making the original threaded comment, it should still be `checked` in edit mode)
| Current | Proposed |
| ------ | ------ |
|  |  |
#### Availability and Testing
- We currently have an end to end test for reviews with multiple comments `qa/qa/specs/features/browser_ui/3_create/merge_request/suggestions/batch_suggestion_spec.rb`. Recommendation is to modify this test or create a new test, which covers the functionality of being able to add a comment immediately while a review is ongoing.
- Replace test code (if any) associated with `Comment and resolve thread` button with check box select->Save comment button click.
issue