Update klog dependency to v2

[stmcginnis]

What this PR does / why we need it:

The klog v1 dependency used is quite old now, and the k/k repo has
switched to more recent v2 versions for quite some time now.

This updates klog usage to use the v2 package version.

Special notes for your reviewer:

This is part of an overall effort along with updating the k-sigs/cluster-api repo here:

kubernetes-sigs/cluster-api#4284

/kind cleanup

Release note:

NONE

[k8s-ci-robot]

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[k8s-ci-robot]

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/ok-to-test

[vincepri]

/lgtm

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/approve

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