test: replace forEach with for..of in test-http2-client-destroy.js

PR-URL: #49820
Reviewed-By: Luigi Pinca <[email protected]>

Author: niyashiyas

test/parallel/test-http2-client-destroy.js

@@ -22,7 +22,7 @@ const { getEventListeners } = require('events');
       server.close();
     });
 
-    destroyCallbacks.forEach((destroyCallback) => {
+    for (const destroyCallback of destroyCallbacks) {
       const client = h2.connect(`http://localhost:${server.address().port}`);
       client.on('connect', common.mustCall(() => {
         const socket = client[kSocket];
@@ -45,7 +45,7 @@ const { getEventListeners } = require('events');
 
         countdown.dec();
       }));
-    });
+    }
   }));
 }