Uniformize code between both pipelines tables

What does this MR do?

3 things:

• Adds tooltip mixin to async button component
• Removes service call and uses eventhub instead
• Uses a mixin to DRY pipelines code shared in commits, mr and pipelines index

Does this MR meet the acceptance criteria?

• Tests
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #31349 (closed) Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/33754 Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/31181