[build-image] Add internal parameter to distinguish official AMI build

[hanwen-cluster]

This allows more complete AMI cleanup when build official AMIs

Tests

• AMI builds on all OS are successful

References

• Cookbook Clean Resolv.conf in official AMI build aws-parallelcluster-cookbook#2920

Checklist

• Make sure you are pointing to the right branch.
• If you're creating a patch for a branch other than develop add the branch name as prefix in the PR title (e.g. [release-3.6]).
• Check all commits' messages are clear, describing what and why vs how.
• Make sure to have added unit tests or integration tests to cover the new/modified code.
• Check if documentation is impacted by this change.

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