Add a dual stack configuration example

[nrb]

What type of PR is this?
/kind documentation

What this PR does / why we need it:

This PR adds an example DaemonSet and cloud-config file for enabling IPv4 and IPv6 node IPs.

This change was made because kubernetes-sigs/provider-aws-test-infra#530 relies on it - see https://github.com/kubernetes-sigs/provider-aws-test-infra/blob/main/kubetest2-ec2/config/run-post-install.sh#L25 where the examples directory is downloaded. Without these CCM options, nodes in a dual-stack install cannot come online.

This is also useful information for any user looking to use dual stack nodes in general, however.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

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[k8s-ci-robot]

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If cloud-provider-aws contributors determine this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

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[nrb]

/test pull-cloud-provider-aws-e2e-kubetest2-quick

[k8s-ci-robot]

@nrb: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cloud-provider-aws-e2e-kubetest2	b2998ab	link	false	/test pull-cloud-provider-aws-e2e-kubetest2
pull-cloud-provider-aws-e2e-kubetest2-quick	b2998ab	link	false	/test pull-cloud-provider-aws-e2e-kubetest2-quick

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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