test: replace AWS SDK v1 imports with v2

[Juneezee]

Issue

Description

We migrated to AWS SDK v2 in #3844. But some new commits accidentally introduced v1 package back again:

• 643f33d
• 4f950a1
• b0e9edd
• 0169f63
• 73b1f0e
• d85426e
• 04e8e9b

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

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[k8s-ci-robot]

Hi @Juneezee. 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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[shraddhabang]

/ok-to-test