Automated cherry pick of #12187: Add option in Cluster Autoscaler AddOn for AWS EC2 Static instance list

[amitpd]

Cherry pick of #12187 on release-1.21.

#12187: Add option in Cluster Autoscaler AddOn for AWS EC2 Static instance list

For details on the cherry pick process, see the cherry pick requests page.

[k8s-ci-robot]

Hi @amitpd. Thanks for your PR.

I'm waiting for a kubernetes 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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[amitpd]

/assign @olemarkus

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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