WIP: investigate kubelet stats slowdown

[haircommander]

What type of PR is this?

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #
related to #2394

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[openshift-ci-robot]

@haircommander: the contents of this pull request could not be automatically validated.

The following commits could not be validated and must be approved by a top-level approver:

• 6c725d9|WIP: UPSTREAM: : don't report metrics for host network pods: does not specify an upstream backport in the commit message
• be33fa5|UPSTREAM: : stats: handful of optimizations: does not specify an upstream backport in the commit message
• dbde6fb|UPSTREAM: : WIP do not query for node name from api for metrics resource: does not specify an upstream backport in the commit message

Comment /validate-backports to re-evaluate validity of the upstream PRs, for example when they are merged upstream.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@haircommander: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/verify	6c725d9	link	true	/test verify
ci/prow/e2e-aws-ovn-fips	6c725d9	link	true	/test e2e-aws-ovn-fips
ci/prow/e2e-aws-ovn-runc	6c725d9	link	true	/test e2e-aws-ovn-runc
ci/prow/e2e-aws-ovn-crun	6c725d9	link	true	/test e2e-aws-ovn-crun
ci/prow/e2e-aws-ovn-techpreview	6c725d9	link	false	/test e2e-aws-ovn-techpreview
ci/prow/unit	6c725d9	link	true	/test unit
ci/prow/e2e-gcp	6c725d9	link	true	/test e2e-gcp
ci/prow/e2e-aws-crun-wasm	6c725d9	link	true	/test e2e-aws-crun-wasm
ci/prow/e2e-aws-ovn-techpreview-serial	6c725d9	link	false	/test e2e-aws-ovn-techpreview-serial
ci/prow/e2e-aws-ovn-cgroupsv2	6c725d9	link	true	/test e2e-aws-ovn-cgroupsv2
ci/prow/k8s-e2e-gcp-serial	6c725d9	link	true	/test k8s-e2e-gcp-serial
ci/prow/k8s-e2e-gcp-ovn	6c725d9	link	true	/test k8s-e2e-gcp-ovn
ci/prow/e2e-aws-ovn-hypershift	6c725d9	link	true	/test e2e-aws-ovn-hypershift

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