Move "Allow force push" into "Allow to push and merge" section
<!--IssueSummary start-->
<details>
<summary>
Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards.
</summary>
- [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=561294)
</details>
<!--IssueSummary end-->
# Context
In Branch rules, there is a relationship between `Allowed to push and merge` and `Allow force push`. We currently show these as 2 separate sections, however they are related.
For example, if a user sets `Allowed to push and merge` to `No one`, then the `Allow force push setting` is not actually allowing anybody to force push.
# Design proposal
Integrate `Allow force push` it into the Edit panel of `Allowed to push and merge`.
[:art: Figma](https://www.figma.com/design/eq2nf3B8MhB9xKrC0VzbPf/branch/KkHkfrRni8Ujg0GM9NI57j/Repository?m=auto&node-id=7422-52043&t=rImHZMe7SFRRxUdr-1)
| Current | Proposed |
|---------|----------|
| {width="2601" height="2122"} |  |
issue