refactor: use native padStart() in padLeftZeros utility (#4202)

Co-authored-by: Andrei Zhaleznichenka <zhalea@amazon.de>

Author: TrevorBurnham

src/internal/utils/strings/pad-left-zeros.ts

@@ -5,8 +5,5 @@
  * Prefixes given text with zeros until it reaches the target length.
  */
 export function padLeftZeros(text: string, length: number): string {
-  while (text.length < length) {
-    text = `0${text}`;
-  }
-  return text;
+  return text.padStart(length, '0');
 }