[Profiling] Add field profiling.agent.config.sampling_frequency to profiling-hosts (#117752)

Author: rockdaboot

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

@@ -135,6 +135,9 @@
                 },
                 "config.present_cpu_cores": {
                   "type": "integer"
+                },
+                "config.sampling_frequency": {
+                  "type": "integer"
                 }
               }
             },