stream: fix Readable stream state properties

Looks like they have been accidentally moved in
#31144.

PR-URL: #34886
Reviewed-By: Robert Nagy <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Zeyu Yang <[email protected]>
Reviewed-By: Anto Aravinth <[email protected]>
Reviewed-By: Ricky Zhou <[email protected]>

lib/_stream_readable.js

@@ -1176,13 +1176,17 @@ ObjectDefineProperties(Readable.prototype, {
     }
   },
 
-  // Legacy getter for `pipesCount`
+});
+
+ObjectDefineProperties(ReadableState.prototype, {
+  // Legacy getter for `pipesCount`.
   pipesCount: {
     get() {
       return this.pipes.length;
     }
   },
 
+  // Legacy property for `paused`.
   paused: {
     get() {
       return this[kPaused] !== false;