test: remove apisix-standalone-only skip in ADC validation e2e tests

Both apisix and apisix-standalone backends now support /apisix/admin/configs/validate
via ADC PR api7/adc#434. The CI uses apache/apisix:dev and ghcr.io/api7/adc:dev
which include this support, so the skip guard is no longer needed.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: AlinsRan

test/e2e/webhook/apisixconsumer.go

@@ -89,10 +89,6 @@ stringData:
 	})
 
 	It("should reject invalid plugin config during ADC validation", func() {
-		if framework.ProviderType != framework.ProviderTypeAPISIXStandalone {
-			Skip("ADC validation requires apisix-standalone backend")
-		}
-
 		privateKeyYAML := "          " + strings.ReplaceAll(framework.TestKey, "\n", "\n          ")
 
 		firstConsumer := fmt.Sprintf(`
@@ -154,10 +150,6 @@ spec:
 	})
 
 	It("should reject consumer update that fails ADC validation", func() {
-		if framework.ProviderType != framework.ProviderTypeAPISIXStandalone {
-			Skip("ADC validation requires apisix-standalone backend")
-		}
-
 		consumerName := "webhook-apisixconsumer-update"
 
 		validConsumer := fmt.Sprintf(`

test/e2e/webhook/apisixroute.go

@@ -99,10 +99,6 @@ spec:
 	})
 
 	It("should reject routes that fail ADC validation", func() {
-		if framework.ProviderType != framework.ProviderTypeAPISIXStandalone {
-			Skip("ADC validation requires apisix-standalone backend")
-		}
-
 		backendService := "webhook-route-backend"
 		routeName := "webhook-apisixroute-invalid"
 
@@ -181,10 +177,6 @@ spec:
 	})
 
 	It("should reject route update that fails ADC validation", func() {
-		if framework.ProviderType != framework.ProviderTypeAPISIXStandalone {
-			Skip("ADC validation requires apisix-standalone backend")
-		}
-
 		backendService := "webhook-route-update-backend"
 		routeName := "webhook-apisixroute-update"
 

test/e2e/webhook/apisixtls.go

@@ -92,10 +92,6 @@ spec:
 	})
 
 	It("should reject invalid TLS material during ADC validation", func() {
-		if framework.ProviderType != framework.ProviderTypeAPISIXStandalone {
-			Skip("ADC validation requires apisix-standalone backend")
-		}
-
 		serverSecret := "invalid-server-tls"
 		tlsName := "webhook-apisixtls-invalid"
 		host := "invalid-webhook.example.com"
@@ -151,10 +147,6 @@ spec:
 	})
 
 	It("should reject TLS update with invalid certificate material", func() {
-		if framework.ProviderType != framework.ProviderTypeAPISIXStandalone {
-			Skip("ADC validation requires apisix-standalone backend")
-		}
-
 		validSecret := "update-valid-tls"
 		invalidSecret := "update-invalid-tls"
 		tlsName := "webhook-apisixtls-update"

test/e2e/webhook/consumer.go

@@ -93,10 +93,6 @@ stringData:
 	})
 
 	It("should reject invalid plugin config during ADC validation", func() {
-		if framework.ProviderType != framework.ProviderTypeAPISIXStandalone {
-			Skip("ADC validation requires apisix-standalone backend")
-		}
-
 		gatewayName := s.Namespace()
 
 		firstConsumer := fmt.Sprintf(`
@@ -161,10 +157,6 @@ spec:
 	})
 
 	It("should reject consumer update that fails ADC validation", func() {
-		if framework.ProviderType != framework.ProviderTypeAPISIXStandalone {
-			Skip("ADC validation requires apisix-standalone backend")
-		}
-
 		gatewayName := s.Namespace()
 		consumerName := "webhook-consumer-update"