Add actions to MR Merge Check failed list for: Draft

Context

In these epics:

• Frontend merge widget updates (&11236 - closed)
  • Simplify Merge Request merge state widget (&11416 - closed)

we're moving the Merge widget from presenting ONE merge check failure at a time and support showing multiple checks' results.

Task

Currently, the single-failure state message displays the action of Mark as ready for MRs in draft mode:

This issue covers re-implementing that action in the list of merge checks:

Proposal

Re-implement the action "Mark as ready" as Level 2 Action:

in https://design.gitlab.com/patterns/merge-request-reports#level-2

Availability and Testing

Adjust Mark as Ready feature specs in spec/features/merge_request/user_resolves_wip_mr_spec.rb. Exploratory testing of feature.