tests: remove public-url config and add dex-oidc-config relation #1080

Job	Run time
Run Tests / Lint Code (pilot)	26s
Run Tests / Observability Integration Test (1.25-strict/stable)	52m 21s
Run Tests / Lint Code (gateway)	19s
Publish Charm / Generate the Charm Matrix	11s
Run Tests / Observability Integration Test (1.26-strict/stable)	51m 59s
Run Tests / Integration Test (1.25-strict/stable, integration)	58m 57s
Run Tests / Unit Test (pilot)	47s
Run Tests / Integration Test (1.25-strict/stable, integration-tls-provider)	56m 26s
Run Tests / Unit Test (gateway)	32s
Run Tests / Integration Test (1.25-strict/stable, integration-tls-secret)	50m 44s
Run Tests / Integration Test (1.29-strict/stable, integration)	59m 27s
Run Tests / Integration Test (1.29-strict/stable, integration-tls-provider)	50m 49s
Run Tests / Integration Test (1.29-strict/stable, integration-tls-secret)	53m 31s
Run Tests / Check libraries (istio-gateway) / Check libraries	3s
Run Tests / Check libraries (istio-gateway) / Lint	7s
Run Tests / Check libraries (istio-pilot) / Check libraries	27s
Run Tests / Check libraries (istio-pilot) / Lint	11s
Publish Charm / Publish Charm (./charms/istio-pilot)	37m 28s
Publish Charm / Publish Charm (./charms/istio-gateway)	15m 48s
	8h 10m 33s

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