++ fix openobserve otel secrets

infrastructure/openobserve/base/namespace.yaml

@@ -2,5 +2,3 @@ apiVersion: v1
 kind: Namespace
 metadata:
   name: openobserve
-  labels:
-    istio-injection: disabled

infrastructure/opentelemetry-collector/yc-k8s-test/opentelemetry-collector.yaml

@@ -15,6 +15,8 @@ spec:
     remediation:
       retries: 3
   values:
+    imagePullSecrets:
+      - name: regcred
     mode: daemonset
     fullnameOverride: otel-collector
     serviceAccount: