Upgrade Kubernetes plugin to 1.30.0

[thecooldrop]

Describe the bug
During running of Jenkins Kubernetes Operator on local kind cluster I was not able to run my pipelines in Pods due to an issue in 1.29.7 Kubernetes plugin. Namely it seems that there was a build-error for this plugin version and any attempt to run a pipeline within a Pod results in NoSuchMethodException, due to lack of fabric8 methods.

To Reproduce
Follow the following steps:

• Download Kind tool
• Execute command kind cluster create
• Install Jenkins operator into local cluster with default values provided by the chart ( Helm installation )
• Login to the instance via port-forwarding
• Create a new pipeline, and choose to run sample pipeline Declarative (Kubernetes)
• Run it
• Observe how large number of Pods get created and never start

Additional information

Kubernetes version: 1.21.1
Jenkins Operator version: 0.6

[prryb]

#579

That's already merged in.

[prryb]

You can always supply upgraded plugins in basePlugins - the default version of kubernetes plugin is upgraded to 1.30.0 on master branch – it will go out in the next release.