feat(ecr-cred-provider): support public dualstack endpoints

[mselim00]

What type of PR is this?

/kind feature

What this PR does / why we need it:

This PR supports getting an authorization token for credential requests involving ECR's dualstack endpoint. This would enable authenticated pulls using ipv6, and help reduce image pull throttling for users in that situation.

Which issue(s) this PR fixes:

Related to awslabs/amazon-eks-ami#2592

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Support authentication for ECR public dual-stack endpoints

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[k8s-ci-robot]

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[kmala]

/ok-to-test

[kmala]

/triage accepted

[kmala]

/lgtm

[kmala]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kmala

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