Script to generate Numaplane Kustomize Transformer config starting from the equivalent file on Numaplane

[afugazzotto]

Summary

If the Kustomize Transformer config file is updated on Numaflow, we want to automate as much as possible updating the equivalent file on the Numaplane repo.
We should create a script that downloads the file from the Numaflow repo, modifies its content (paths and kinds), and replaces the local file.
An entry to the Makefile to execute this script should be added.
The script could be executed manually and then perform a manual git commit OR we could include it in a GitHub Actions workflow to periodically update or in CI.

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