Deprecate RCTBridgeWillReloadNotification [3/n]

Summary:
`RCTBridgeWillReloadNotification` has one job: whenever bridge reloads - trigger a reload in `RCTSurfacePresenter`.

Diff 1/2 deprecated bridge reloading APIs, and replaced them with `RCTReloadCommand`. Use that in `RCTSurfacePresenter` instead .

Changelog: [iOS][Deprecate] Deprecate RCTBridgeWillReloadNotification

Reviewed By: shergin

Differential Revision: D17880926

fbshipit-source-id: 00adc4d56d11d40ab371d81bb17a05609c184769

React/Base/RCTBridge.h

@@ -68,8 +68,8 @@ RCT_EXTERN NSString *const RCTDidSetupModuleNotificationModuleNameKey;
 RCT_EXTERN NSString *const RCTDidSetupModuleNotificationSetupTimeKey;
 
 /**
- * This notification fires just before the bridge starts processing a request to
- * reload.
+ * DEPRECATED - Use RCTReloadCommand instead. This notification fires just before the bridge starts
+ * processing a request to reload.
  */
 RCT_EXTERN NSString *const RCTBridgeWillReloadNotification;