Update dependency io.fabric8:kubernetes-client to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.fabric8:kubernetes-client (source)	5.12.2 -> 6.0.0

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Release Notes

fabric8io/kubernetes-client

v6.0.0

Compare Source

Bugs

• Fix #​2811: Approve/Reject CSR not supported in v1beta1 CertificateSigningRequest API
• Fix #​4216: Update metadata when replaceStatus() is called
• Fix #​4217: patchStatus doesn't increment metadata.generation field in Kubernetes Mock Server (CRUD)
• Fix #​4234: corrected the skip method for base64 inputstream

Improvements

• Fix #​3227 : Move config.openshift.io apiGroup resources out of openshift-model/
• Fix #​4006: Remove outdated shared test classes in kubernetes-client/ and openshift-client/ modules

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