🌱Migrate elb to AWS SDK v2

[phuhung273]

What type of PR is this?
/kind cleanup
/kind deprecation

What this PR does / why we need it:
This PR migrates elb to AWS SDK V2

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #5405

Special notes for your reviewer:

Checklist:

• squashed commits
• includes documentation
• includes emoji in title
• adds unit tests
• adds or updates e2e tests

Release note:

Migrate elb to AWS SDK v2

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @phuhung273. 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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