[Access-tokens][ClusterLoader2] Add standalone test

[jprzychodzen]

Add standalone test for ClusterLoader2 that allows benchmarking and
testing access tokens thresholds.

This test is based on Mateusz's code from github.com/mm4tt/k8s-util.

Cherry-picked 68a1d78

[k8s-ci-robot]

Hi @jprzychodzen. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[jprzychodzen]

I need to check presubmit behavior

/hold

[mborsz]

/ok-to-test

[jprzychodzen]

/unhold
Did not generate broken behavior

[jprzychodzen]

/unhold

[jprzychodzen]

/hold
Presubmit triggered twice:

• https://prow.k8s.io/log?id=1229769652859572224&job=pull-perf-tests-clusterloader2
• https://prow.k8s.io/log?id=1229769652880543744&job=pull-perf-tests-clusterloader2

[mborsz]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jprzychodzen, mborsz

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• clusterloader2/OWNERS [mborsz]

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[jprzychodzen]

/unhold
Removing hold to fix pool of projects