Enable auto_merge_enabled as PR trigger

[germanne]

Feature Description

Hello!

I think it would be very great if Gitea could support the Github PR trigger "auto_merge_enabled". My team and I are using a last check on PR to make sure it deploys well on a system and want to merge only if this last commit is successful. We only test on "the last check" though and at the moment we don't have any possibility to do this. Enabling merge_queue would be also a possibility, but I think this is far way more work, therefore the question, would it be hard to implement the on auto_merge_enabled button last check?

Thanks a lot in advance for any answer.

Screenshots

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