[JENKINS-26192] Demonstrating @Grab support in a realistic class loader environment

[jglick]

Downstream of jenkinsci/workflow-cps-global-lib-plugin#9.

@reviewbybees

[ghost]

This pull request originates from a CloudBees employee. At CloudBees, we require that all pull requests be reviewed by other CloudBees employees before we seek to have the change accepted. If you want to learn more about our process please see this explanation.

[rsandell]

🐝

[abayer]

🐝

[jglick]

@reviewbybees done

[ghost]

This pull request has completed our internal processes and we now respectfully request the maintainers of this repository to consider our proposal contained within this pull request for merging.

[jglick]

This was not supposed to be merged before workflow-cps-global-lib@2.3 was actually released! Apparently @WithPlugins does not work properly: the test should get skipped unless and until the specified version of the plugin is available.

[olivergondza]

Right, the annotation is not ready for that: JENKINS-38015