enable request tracking prometheus middleware in reva (#4571)

* enable request tracking prometheus middleware in reva

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* enable metrics for ocdav

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

services/auth-machine/pkg/revaconfig/config.go

@@ -32,6 +32,12 @@ func AuthMachineConfigFromStruct(cfg *config.Config) map[string]interface{} {
 					},
 				},
 			},
+			"interceptors": map[string]interface{}{
+				"prometheus": map[string]interface{}{
+					"namespace": "ocis",
+					"subsystem": "auth_machine",
+				},
+			},
 		},
 	}
 }