chore(eks): update nodegroup gpu check and add g6e instance class

[AlexKaracaoglu]

Issue # (if applicable)

Closes #31347.

Reason for this change

The motivating bug is that you cannot add a combo of g5 and a g6 as instance classes onto the same node group or else the following error will be thrown: instanceTypes of different architectures is not allowed.
Further - there was no instance type support for the new g6e instance class.

Description of changes

• (ec2) Adds support for a g6e InstanceClass
  • Announcement: https://aws.amazon.com/about-aws/whats-new/2024/08/amazon-ec2-g6e-instances/
  • g6e: https://aws.amazon.com/ec2/instance-types/g6e/
• (eks) Fixes the isGpuInstanceType check
  • G6/G6E instance classes will now be recognized as GPU instance types so those different types can be used together for a multi instance type managed node group

Description of how you validated changes

Have not since this is a chore to add in a new instance type and add onto the known gpu types. Happy to write some tests to cover the new additions if that is preferred.

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

[lpizzinidev]

Thanks 👍

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 8e88f82
• Result: SUCCEEDED
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