feat(ec2): support for c7i and r7iz instance types in aws-ec2

[kevntao]

Support of C7i and R7iz EC2-Instance types in aws-ec2.

The C7i and the R7iz instance types were introduced in September 2023.
Both instance types are confirmed to be supported in AWS-Cloudformation.

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[aws-cdk-automation]

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[kevntao]

Exemption Request

This PR is similar to this PR, which didn't need changes to the README or tests.

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

[scanlonp]

Thanks!

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 36d8d1a
• Result: SUCCEEDED
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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).