[WIP] Refactor e2e tests to ginkgo framework

[Shilpa-Gokul]

Partially fixes #145

This PR focuses on converting the bash based code in test/e2e/e2e.sh to ginkgo tests. make test-e2e command will now invoke the tests using ginkgo command.

Since this PR has already reached size XL, I’ve decided to move the pending items listed below to a follow-up PR to keep the review process manageable. Hope that's fine!

• Change all the code in test/e2e/setup-e2e.sh and test/e2e/teardown-e2e.sh to ginkgo tests
• Cleanup the existing bash based test scripts (e2e.sh, setup-e2e.sh, teardown-e2e.sh)

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[k8s-ci-robot]

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[Shilpa-Gokul]

Looking forward to any feedback or comments on the implementation.

cc @nojnhuh