Create codegen-cluster.yaml

[ahsan518]

Create codegen-cluster.yaml file for the creation of codegen gke cluster through cluster toolkit

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• Fork your PR branch from the Toolkit "develop" branch (not main)
• Test all changes with pre-commit in a local branch #
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• Add or modify unit tests to cover code changes
• Ensure that unit test coverage remains above 80%
• Update all applicable documentation
• Follow Cluster Toolkit Contribution guidelines #

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[ankitkinra]

Meta comment :

• Create a new folder in community/examples/intel
• Move this file to the above folder
• Add the codegen.yaml file there.
• Please update manual test cases that were done.