Adding isolated script for kube-burner execution

[vishnuchalla]

Description

Adding isolated script for kube-burner execution, without tampering any of the existing flows.

Testing

Will be helpful to test out this pre-submit: kubernetes/test-infra#37069. More context here

[kubernetes-prow]

Hi @vishnuchalla. Thanks for your PR.

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[kubernetes-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Details

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[vishnuchalla]

@mengqiy @upodroid PTAL 👋🏼

[serathius]

There was a following discussion which included more people and raised some concerns that need to be addressed before we move forward: https://docs.google.com/document/d/1hEpf25qifVWztaeZPFmjNiJvPo-5JX1z0LSvvVY5G2g/edit?tab=t.0#bookmark=id.6b5me4ivj8n4