[SPARK-33471][K8S][BUILD] Upgrade kubernetes-client to 4.12.0#30401

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ramesh-muthusamy wants to merge 2 commits intoapache:masterfrom

ramesh-muthusamy:SPARK-33471-k8s-clientupgrade

Commits on Nov 17, 2020

OIDC Authentication token provider integration, upgrading to the k8s client with the OIDC feature integrated with http client utils
ramesh-muthusamy
committed
upgrade k8s client to 4.12.0 & transitive dependencies along with API compatibility changes
ramesh-muthusamy
committed