Pending review comments look like internal notes
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## Proposal
1. Change the background color of a draft note from `--gl-color-orange-50` to `--gl-background-color-strong`
2. Add the `status-waiting` icon to the "Pending" badge
Variable name for draft note background: `--timeline-entry-draft-note-background-color`
| State | Mockup |
| ------ | ------ |
| Current | {width=900 height=182} |
| Updated | {width=900 height=182} |
| Updated (Dark mode) | {width=900 height=182} |
:art: [Figma](https://www.figma.com/design/0ABBYYEvZTroTREb7yydtk/Comments-and-Diffs?node-id=139-11058&t=vbZFW2rYw8UnR7Mv-1)
## Problem
Consider changing the styling or adding an icon to help differentiate between "pending" and "Internal notes" in a merge request.
Reported by GitLab team member that they didn't realize that they didn't submit their review

From `@timofurrer`
> I just experienced a very unfortunate UX issues where a pending review comment to an internal note is no longer stands out because they use the same color. It would be nice if they don’t share the same background color
Related to https://gitlab.com/gitlab-org/gitlab/-/issues/562579
issue