Use warnOnce for excessive number of callbacks error (#26508)

Summary:
I happened to hit this error a couple times and the issue is that if there are let's say 1000 pending callbacks the error would be triggered 500 times and pretty much crash the app. I think it is reasonable to use warn once here so it only happens once.

## Changelog

[General] [Fixed] - Use `warnOnce` for excessive number of callbacks error
Pull Request resolved: #26508

Test Plan: Tested by reducing the number of pending callbacks required to trigger the error.

Reviewed By: TheSavior

Differential Revision: D17512917

Pulled By: JoshuaGross

fbshipit-source-id: 5ce8e2a0a166805cc6f3fe6d78e2716d6792a80e

Libraries/BatchedBridge/MessageQueue.js

@@ -16,6 +16,7 @@ const Systrace = require('../Performance/Systrace');
 const deepFreezeAndThrowOnMutationInDev = require('../Utilities/deepFreezeAndThrowOnMutationInDev');
 const invariant = require('invariant');
 const stringifySafe = require('../Utilities/stringifySafe');
+const warnOnce = require('../Utilities/warnOnce');
 
 export type SpyData = {
   type: number,
@@ -225,11 +226,13 @@ class MessageQueue {
             const method = debug && this._remoteMethodTable[debug[0]][debug[1]];
             info[callID] = {module, method};
           });
-          console.error(
+          warnOnce(
+            'excessive-number-of-pending-callbacks',
             `Please report: Excessive number of pending callbacks: ${
               this._successCallbacks.size
-            }. Some pending callbacks that might have leaked by never being called from native code:`,
-            info,
+            }. Some pending callbacks that might have leaked by never being called from native code: ${stringifySafe(
+              info,
+            )}`,
           );
         }
       }