fix: brownfield integration (#6774)

## Summary

In brownfield, ` // we need only one instance because SurfacePresenter
is the same during the application lifetime` is false since you can
destroy RN and create it again.

## Test plan
Run Reanimated in brownfield and try to create and destroy the whole RN
a couple of times.

packages/react-native-reanimated/apple/reanimated/apple/Fabric/REAInitializerRCTFabricSurface.h

@@ -5,7 +5,7 @@
 
 @interface REAInitializerRCTFabricSurface : RCTFabricSurface
 
-@property REAModule *reaModule;
+@property __weak REAModule *reaModule;
 
 @end
 

packages/react-native-reanimated/apple/reanimated/apple/REAModule.mm

@@ -193,9 +193,10 @@ - (void)setBridge:(RCTBridge *)bridge
 
 - (void)setReaSurfacePresenter
 {
-  if (reaSurface == nil) {
-    // we need only one instance because SurfacePresenter is the same during the application lifetime
-    reaSurface = [[REAInitializerRCTFabricSurface alloc] init];
+  if (_surfacePresenter && ![_surfacePresenter surfaceForRootTag:reaSurface.rootTag]) {
+    if (!reaSurface) {
+      reaSurface = [[REAInitializerRCTFabricSurface alloc] init];
+    }
     [_surfacePresenter registerSurface:reaSurface];
   }
   reaSurface.reaModule = self;