Add watch list to load test

[serathius]

/kind feature
/cc @mborsz

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: serathius
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[serathius]

We had a pass on LIST with 1.93GB resource size.

[serathius]

/retest

[k8s-ci-robot]

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

Test name	Commit	Details	Required	Rerun command
pull-perf-tests-ec2-master-scale-performance-100	e96b1f1	link	true	/test pull-perf-tests-ec2-master-scale-performance-100

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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