[Profiling] Add k8s namespace to events (#117323)

Co-authored-by: Francesco Gualazzi <[email protected]>

x-pack/plugin/core/template-resources/src/main/resources/profiling/component-template/profiling-events.json

@@ -9,6 +9,7 @@
         "sort": {
           "field": [
             "profiling.project.id",
+            "k8s.namespace.name",
             "orchestrator.resource.name",
             "host.name",
             "container.name",
@@ -80,6 +81,9 @@
         },
         "container.id": {
           "type": "keyword"
+        },
+        "k8s.namespace.name": {
+          "type": "keyword"
         }
       }
     }