Show equivalent push options at bottom of create merge request page
### Problem to solve While [push options](https://docs.gitlab.com/ee/user/project/push_options.html#push-options-for-merge-requests) is a very powerful feature, it can be [opaque and hard to use](https://news.ycombinator.com/item?id=31010933) even for folks who are [relatively versed](https://news.ycombinator.com/item?id=31021991) with GitLab and the command line. It also can be a [hard to discover](https://news.ycombinator.com/item?id=31021852) feature. ### Proposal Add the equivalent push option command line at the bottom of the `{group}/{project}/-/merge_requests/new` For example: ![CleanShot_2022-04-15_at_10.25.18_2x](/uploads/e09590f5cdc48bfe4d4fca946abd062d/CleanShot_2022-04-15_at_10.25.18_2x.png) This could get rather long, so maybe under an expand / click to show method from a UX perspective would be better? <!-- Label reminders Use the following resources to find the appropriate labels: - https://gitlab.com/gitlab-org/gitlab/-/labels - https://about.gitlab.com/handbook/product/categories/features/ -->
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