Fix OTel Exporter creating Monitored Resource for Cloud Run.

Achieving parity with the go implementation.

https://github.com/GoogleCloudPlatform/opentelemetry-operations-go/blob/8da0f42dab085c916987891419461d583a2aa96e/internal/resourcemapping/resourcemapping.go#L153

Author: DouglasHeriot

google/cloud/opentelemetry/internal/monitored_resource.cc

@@ -162,8 +162,8 @@ MonitoredResourceProvider GenericTask() {
           {"location",
            {{sc::kCloudAvailabilityZone, sc::kCloudRegion}, "global"}},
           {"namespace", {{sc::kServiceNamespace}}},
-          {"job", {{sc::kServiceName}}},
-          {"task_id", {{sc::kServiceInstanceId}}},
+          {"job", {{sc::kServiceName, sc::kFaasName}}},
+          {"task_id", {{sc::kServiceInstanceId, sc::kFaasInstance}}},
       });
 }
 
@@ -174,7 +174,7 @@ MonitoredResourceProvider GenericNode() {
           {"location",
            {{sc::kCloudAvailabilityZone, sc::kCloudRegion}, "global"}},
           {"namespace", {{sc::kServiceNamespace}}},
-          {"node_id", {{sc::kHostId}}},
+          {"node_id", {{sc::kHostId, sc::kHostName}}},
       });
 }