chore: add debug logs for istio injection logic #2646

Job	Run time
lint-check	1m 3s
Select Jobs	3s
Schedule (all, registry1, upgrade) / Test	23m 37s
Schedule (all, unicorn, install) / Test	13m 41s
Schedule (all, registry1, install) / Test	16m 31s
Schedule (all, unicorn, upgrade) / Test	20m 39s
Schedule (all, upstream, install) / Test	14m 40s
Schedule (all, upstream, upgrade) / Test	21m 39s
Compliance Evaluation (upstream) / Evaluate	27s
Compliance Evaluation (registry1) / Evaluate	31s
Compliance Evaluation (unicorn) / Evaluate	46s
	1h 53m 37s

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