feat(ec2): add c8g and m8g instance classes

[rockaport]

Issue # (if applicable)

Closes #32522

Reason for this change

Added new graviton 4 instance classes

Description of changes

Updated the ec2 instance class enum definitions to include new graviton 4 types

Description of how you validated changes

No

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

The pull request linter has failed. See the aws-cdk-automation comment below for failure reasons. If you believe this pull request should receive an exemption, please comment and provide a justification.

A comment requesting an exemption should contain the text Exemption Request. Additionally, if clarification is needed add Clarification Request to a comment.

[rockaport]

Exemption Request I didn't find any other tests/readme changes for earlier versions of this instance class

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

[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).

[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).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.54%. Comparing base (b8e79b6) to head (41542d3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #32528   +/-   ##
=======================================
  Coverage   80.54%   80.54%           
=======================================
  Files         106      106           
  Lines        6954     6954           
  Branches     1287     1287           
=======================================
  Hits         5601     5601           
  Misses       1175     1175           
  Partials      178      178           

Flag	Coverage Δ
suite.unit	80.54% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	80.54% <ø> (ø)

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 41542d3
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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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).

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