Update synchronize istio to include ztunnel support

[kunal-511]

Pull Request Template for Kubeflow Manifests

✏️ Summary of Changes

Update split-istio-packages script to extract ztunnel resources
Update synchronize-istio-manifests to generate ztunnel manifests with ambient mode enabled

🐛 Related Issues

#3246

✅ Contributor Checklist

• I have tested these changes with kustomize. See Installation Prerequisites.
• All commits are signed-off to satisfy the DCO check.
• I have considered adding my company to the adopters page to support Kubeflow and help the community, since I expect help from the community for my issue (see 1. and 2.).

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[kunal-511]

/retest

[kunal-511]

/retest

[juliusvonkohout]

Thank you for the PR. I think github was a bit slow which lead to failed tests. I retriggered all tests. Probably you can revert the Katib timeout.

[juliusvonkohout]

You cal also always retest with /retest if needed

[juliusvonkohout]

And i am still wondering why the DEX test is so unreliable https://github.com/kubeflow/manifests/actions/runs/19438990652/job/55622642323 is so unreliable

[juliusvonkohout]

Lets wait with merging until #3274 (comment) is resolved

[juliusvonkohout]

Thank you

/lgtm
/approve

and here is the istio PR for your /lgtm #3275

[google-oss-prow]

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