refactor: add explicit log when skipping ADC due to initErr in ApisixConsumer webhook

Separate the initErr and warnings checks for better observability:
log the init error explicitly when skipping ADC validation due to a
failed ADC client initialization.

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

Author: AlinsRan

internal/webhook/v1/apisixconsumer_webhook.go

@@ -75,7 +75,11 @@ func (v *ApisixConsumerCustomValidator) ValidateCreate(ctx context.Context, obj
 	}
 
 	warnings := v.collectWarnings(ctx, consumer)
-	if v.initErr != nil || len(warnings) > 0 {
+	if v.initErr != nil {
+		apisixConsumerLog.Error(v.initErr, "ADC validator init failed, skipping ADC validation")
+		return warnings, nil
+	}
+	if len(warnings) > 0 {
 		return warnings, nil
 	}
 	return warnings, v.adcValidator.Validate(ctx, consumer)
@@ -92,7 +96,11 @@ func (v *ApisixConsumerCustomValidator) ValidateUpdate(ctx context.Context, oldO
 	}
 
 	warnings := v.collectWarnings(ctx, consumer)
-	if v.initErr != nil || len(warnings) > 0 {
+	if v.initErr != nil {
+		apisixConsumerLog.Error(v.initErr, "ADC validator init failed, skipping ADC validation")
+		return warnings, nil
+	}
+	if len(warnings) > 0 {
 		return warnings, nil
 	}
 	return warnings, v.adcValidator.Validate(ctx, consumer)