FIX(opentelemetry-operator): fix ServiceMonitor config path

- Move serviceMonitor config from metrics to manager section
- Fix Helm schema validation error
- Disable ServiceMonitor creation to prevent conflicts

opentelemetry-operator/helm-values.yaml

@@ -25,6 +25,9 @@ manager:
     requests:
       cpu: 10m
       memory: 256Mi
+  # ServiceMonitor configuration
+  serviceMonitor:
+    enabled: false  # Disable ServiceMonitor creation to prevent conflicts
 
 # Admission webhooks (uses cert-manager self-signed CA)
 admissionWebhooks:
@@ -50,8 +53,3 @@ tolerations:
 
 nodeSelector:
   node-role.kubernetes.io/control-plane: "true"
-
-# Metrics and ServiceMonitor configuration
-metrics:
-  serviceMonitor:
-    enabled: false  # Disable ServiceMonitor creation to prevent conflicts