[JENKINS-52914] - Allow decorating Launchers for runs, introduce a createLauncher API on the Run level

[oleg-nenashev]

Just detaching some code from #3575 which we will unlikely need in the current implementation. It may be still useful as overall generalization, please let me know if somebody finds it useful.

See JENKINS-52914.

Proposed changelog entries

• RFE: Developer: Introduce Run#createLauncher() and LauncherDecorator#decorateFor(Run) API
• ...

Submitter checklist

• JIRA issue is well described
• Changelog entry appropriate for the audience affected by the change (users or developer, depending on the change). Examples
  * Use the Internal: prefix if the change has no user-visible impact (API, test frameworks, etc.)
• Appropriate autotests or explanation to why this change has no tests
• For dependency updates: links to external changelogs and, if possible, full diffs

Desired reviewers

@mention

[jglick]

I cannot see anything wrong with it, but we should not merge a new API with no known use case.

[jglick]

revert

[oleg-nenashev]

Yes. Likely it needs a reference impl, e.g. in Pipeline or other plugin which creates lanchers

[daniel-beck]

This seems abandoned given the lack of progress and comments since August. Therefore closing as stalled.