Add Replay option to experimental Run UI + support for other plugins

[janfaracik]

Up for discussion.

The intention behind this PR is to add the Replay (and Edit and replay) action to the experimental Run UI app bar. This is very much inspired by the Pipeline Graph View plugin, which features a similar UI. This PR also introduces support for plugins to contribute actions to this menu.

The current proposed hierarchy is:

• Replay
  • Edit and replay
  • Rebuild (via Rebuilder plugin)
  • Restart from stage (via Pipeline: Declarative plugin)

Screenshot

Questions around this

• Is this the right spot for this extension? Should this live in core instead?
• Is Replay the most commonly used action, and thus deserves top spot over other potential actions?

@timja

Testing done

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[timja]

Replay makes the most sense, although terminology wise I think it should be Rebuild or something, replay is just so weird - checking pipeline graph view we've used Rerun there.

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I wonder if restart from stage should have a different treatment?

From what I remember in the classic view there's an action that takes you to a page to restart it.
From BlueOcean there's a link above the logs for the selected stage? which makes more sense doesn't it?

[janfaracik]

From BlueOcean there's a link above the logs for the selected stage? which makes more sense doesn't it?

Could you ping a screenshot of this?

Ah I see - I could see having both? E.g. the menu opens a dialog with a select input and you could do it from the Pipeline Graph View page? I like the idea of grouping all related new build controls.