HCI mesh network disconnectvity and topology testcases automation for block vanilla

[Aishwarya-Hebbar]

What this PR does / why we need it: HCI mesh network disconnectvity and topology testcases automation

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Testing done:
In progress

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Aishwarya-Hebbar
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[k8s-ci-robot]

Hi @Aishwarya-Hebbar. Thanks for your PR.

I'm waiting for a kubernetes-sigs 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.

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