Changing ginkgo describe string for topology aware e2e tests

[chethanv28]

What this PR does / why we need it:
This PR is changing the ginkgo describe string for zone tests. This is required to have a distinct string for different category of tests. Previously zone tests had a prefix of non-zone tests and it is being fixed by this PR.

Special notes for your reviewer:
Changed only the description string for non-zone tests

Release note:

Changing the description string for non-zone e2e tests

[k8s-ci-robot]

Hi @chethanv28. Thanks for your PR.

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[divyenpatel]

/ok-to-test

[divyenpatel]

/lgtm

[divyenpatel]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chethanv28, divyenpatel

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