feat: optional istio cni ztunnel component #4649

Job	Run time
lint-check	34s
Select Jobs	3s
Schedule (all, registry1, upgrade) / Test	30m 4s
Schedule (all, unicorn, install) / Test	21m 39s
Schedule (all, unicorn, upgrade) / Test	31m 52s
Schedule (all, registry1, install) / Test	24m 47s
Schedule (all, upstream, install) / Test	24m 0s
Schedule (all, upstream, upgrade) / Test	29m 53s
Schedule (base, registry1, install) / Test	6m 40s
Schedule (base, unicorn, install) / Test	5m 10s
Schedule (base, upstream, install) / Test	5m 27s
Compliance Evaluation (upstream) / Evaluate	9s
Compliance Evaluation (registry1) / Evaluate	11s
Compliance Evaluation (unicorn) / Evaluate	8s
	3h 0m 37s

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