Try removing loading check for merge button

What does this MR do and why?

This MR adds skip_finished_loading_check: true to has_element? because I see the merge button is present in the screenshot (from failed job artifact)

Job failure being addressed: https://gitlab.com/gitlab-org/gitlab/-/jobs/9745393173#L1171

References

https://gitlab.com/gitlab-org/gitlab/-/issues/536265

Screenshots or screen recordings

Before	After

How to set up and validate locally

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.