feat: add support for public clients and disabling standard auth flow #2666

Job	Run time
lint-check	38s
Select Jobs	4s
Schedule (all, unicorn, install) / Test	13m 38s
Schedule (all, registry1, upgrade) / Test	19m 19s
Schedule (all, unicorn, upgrade) / Test	16m 6s
Schedule (all, registry1, install) / Test	16m 8s
Schedule (all, upstream, install) / Test	14m 49s
Schedule (all, upstream, upgrade) / Test	17m 10s
Compliance Evaluation (registry1) / Evaluate	40s
Compliance Evaluation (upstream) / Evaluate	39s
Compliance Evaluation (unicorn) / Evaluate	30s
	1h 39m 41s

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