Jenkins 33833: get history to work again in batch tasks

[lacostej]

The batch task history has been broken for a while. See https://issues.jenkins.io/browse/JENKINS-33833 for discussion and analysis.

This is a quick&dirty test to get this working again.

The PR currently sits on top of #11 which I hope to merge soon.

I would like some feedback on the approach and the direction of the feature from people with more knowledge of the internals and direction of Jenkins.

Implementation notes

Given that the HistoryPageFilter#add() logic, there were at least 3 options:

• fix Jenkins to support the batch plugin. My guest is that this is unlikely to happen.
• get the plugin to behave like a Job
• get the plugin to behave like a QueueItem

I implemented a very rough "like a Job" solution and it starts giving some result, although plenty is still broken and it doesn't have any code to manage migration for now.

One issue that I am definitely seeing right away is that in my current implementation, the BatchRun became a Run subclass, and I am not able to serialize it nested in the build log anymore.

        <hudson.plugins.batch__task.BatchRun resolves-to="hudson.model.Run$Replacer">

I've attempted a different design (different branch), where I pass adapter classes to the build history widget, but the Run class doesn't allow to set its state at Runtime.

More info in the issue.

Testing done

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