Update of istio to v1.22.0 along with updating github workflows

[biswajit-9776]

Pull Request Template for Kubeflow manifests Issues

• Please include a summary of changes and the related issue.
• List any dependencies that are required for this change.
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✏️ A brief description of the changes

I updated istio to v1.22.0 and modified github workflows in regard of success of multi_tenancy.sh

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🐛 If this PR is related to an issue, please put the link of the issue here.

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✅ Unit Test Checklist

• [ ] 🛠️ Make sure you have installed kustomize == 5.2.1+
• [ ] ✍️ Have you written new tests for your core changes, as applicable?
• [ ] 🔄 Have you successfully run existing tests with your changes ?
• [ ] 🚀 Have you successfully run existing and new tests with your changes ?

✅ Contributor checklist

• [ ] All the commits have been signed-off (To pass the DCO check)
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[APPROVALNOTIFIER] This PR is NOT APPROVED

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[juliusvonkohout]

closed in favor of https://github.com/kubeflow/manifests/pull/2739