Use a correct Object.entries polyfill (#40268)

* Use a correct Object.entries polyfill

Fixes #40243

* Update src/compiler/core.ts

Co-authored-by: Daniel Rosenwasser <[email protected]>

* Added parentheses, DANIEL.

Co-authored-by: Daniel Rosenwasser <[email protected]>

Author: RyanCavanaugh

src/compiler/core.ts

@@ -1304,14 +1304,14 @@ namespace ts {
         return values;
     }
 
-    const _entries = Object.entries ? Object.entries : <T>(obj: MapLike<T>) => {
+    const _entries = Object.entries || (<T>(obj: MapLike<T>) => {
         const keys = getOwnKeys(obj);
         const result: [string, T][] = Array(keys.length);
-        for (const key of keys) {
-            result.push([key, obj[key]]);
+        for (let i = 0; i < keys.length; i++) {
+            result[i] = [keys[i], obj[keys[i]]];
         }
         return result;
-    };
+    });
 
     export function getEntries<T>(obj: MapLike<T>): [string, T][] {
         return obj ? _entries(obj) : [];