Regenerate for 1.30, fix patches

[brendandburns]

@yue9944882 I regenerated for 1.30 including the fixes for nullable arrays, also fixed up the patches so they applied cleanly.

Ref #3076

Please take a look.

Tests are failing b/c the YAML is being generated with empty lists intead of nulls, I'm not sure this is easily fixable but will investigate.

YAML is fixed, but one JSON test is failing and needs a fix.

This is ready for review.

[linux-foundation-easycla]

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• ✅ login: yue9944882 / name: Min Jin (b552ede)

[k8s-ci-robot]

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[brendandburns]

Ok, I updated this so that empty lists are omitted from YAML dumping and I think that should be ok.

[yue9944882]

Error:    KubectlDeleteTest.kubectlDelete:216 No requests exactly matched. Most similar request was:  expected:<
DELETE
/apis/batch%2Fv1/batch%2Fv1/namespaces/foo/jobs/bar

[equalToJson]
{
  "propagationPolicy" : "Foreground"
}> but was:<
DELETE
/apis/batch%2Fv1/batch%2Fv1/namespaces/foo/jobs/bar


{
  "dryRun" : [ ],
  "propagationPolicy" : "Foreground"
}>

it looks like k/k api added a new dry-run option for delete API, so we need to align with that. i will append another commit to fix it

[brendandburns]

@yue9944882 this is fixed up and ready to review, I tried to keep the commits separate for easier reviewing, but I'll likely squash them in the end to fix the issues with authorship and the PR bot.

I had to remove a check from KubectlDrain.java to get tests to pass, but I'm not sure that it really made sense in the first place anyway. Also added an exclusion strategy to GSON for metadata.managedFields

[yue9944882]

EasyCLA — Missing CLA Authorization.

This PR failed CLA check due to bot commit, let me squash the branch into single commit to workaround

[brendandburns]

manual lgtm, since I'm the original author of the PR.