tests: remove public-url config and add dex-oidc-config relation #1120

Job	Run time
Publish Charm / Generate the Charm Matrix	5s
Run Tests / Observability Integration Test (1.25-strict/stable)	1h 1m 6s
Run Tests / Integration Test (1.25-strict/stable, integration)	55m 39s
Run Tests / Observability Integration Test (1.26-strict/stable)	59m 26s
Run Tests / Integration Test (1.25-strict/stable, integration-tls-provider)	55m 56s
Run Tests / Lint Code (pilot)	26s
Run Tests / Integration Test (1.25-strict/stable, integration-tls-secret)	55m 58s
Run Tests / Unit Test (pilot)	43s
Run Tests / Lint Code (gateway)	21s
Run Tests / Integration Test (1.26-strict/stable, integration)	55m 59s
Run Tests / Unit Test (gateway)	30s
Run Tests / Integration Test (1.26-strict/stable, integration-tls-provider)	56m 1s
Run Tests / Integration Test (1.26-strict/stable, integration-tls-secret)	54m 12s
Run Tests / Check libraries (istio-gateway) / Check libraries	2s
Run Tests / Check libraries (istio-gateway) / Lint	9s
Run Tests / Check libraries (istio-pilot) / Check libraries	31s
Run Tests / Check libraries (istio-pilot) / Lint	22s
Publish Charm / Publish Charm (./charms/istio-pilot)	42m 7s
Publish Charm / Publish Charm (./charms/istio-gateway)	15m 21s
	8h 34m 54s

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