CASMPET-7224: remove unnecessary checking of some kubelet certs #5369
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Description
When checking expiration dates of kubelet certs, not all kubelet certs need to be current. Once kubelet certificate is rotated, /var/lib/kubelet/pki/kubelet.crt is no longer used; instead the symbolic link /var/lib/kubelet/pki/kubelet-client-current.pem is used and points to the latest rotated certificate. Only cert in kubelet-client-current.pem file needs to be current. This PR fixes the doc issue.
Checklist
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with the corresponding team in Cray-HPE.