Network invalidate handlers to cleanup in turbo module mode (#41775)

Summary:
We should do some cleanup for handlers in Networking to fix some memory leaks.Ex.  `RCTHTTPRequestHandler` hander, `session` retains the handler which leads to leaks.
https://github.com/facebook/react-native/blob/385473522cbc525aad08500f5a752dea734c14c3/packages/react-native/Libraries/Network/RCTHTTPRequestHandler.mm#L97

## Changelog:

[IOS] [FIXED] - Network invalidate handlers  to cleanup in turbo module mode

Pull Request resolved: #41775

Test Plan: Network handlers clean up after invalidating.

Reviewed By: NickGerleman

Differential Revision: D51846962

Pulled By: dmytrorykun

fbshipit-source-id: 17a2875903cda187f2e3ecea46e8f7f3e10d5264

packages/react-native/Libraries/Network/RCTNetworking.mm

@@ -199,6 +199,11 @@ - (void)invalidate
     [_tasksByRequestID[requestID] cancel];
   }
   [_tasksByRequestID removeAllObjects];
+  for (id<RCTURLRequestHandler> handler in _handlers) {
+    if ([handler conformsToProtocol:@protocol(RCTInvalidating)]) {
+      [(id<RCTInvalidating>)handler invalidate];
+    }
+  }
   _handlers = nil;
   _requestHandlers = nil;
   _responseHandlers = nil;