test: replace forEach to for at test-webcrypto-sign-verify-ecdsa.js

PR-URL: nodejs#50795
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: StiffWriter00

test/parallel/test-webcrypto-sign-verify-ecdsa.js

@@ -227,10 +227,11 @@ async function testSign({ name,
 (async function() {
   const variations = [];
 
-  vectors.forEach((vector) => {
+  for (let i = 0; i < vectors.length; ++i) {
+    const vector = vectors[i];
     variations.push(testVerify(vector));
     variations.push(testSign(vector));
-  });
+  }
 
   await Promise.all(variations);
 })().then(common.mustCall());