test_runner: use primordials in utils.js

Replace native array method (.push) with primordials (ArrayPrototypePush)
in lib/internal/test_runner/utils.js for consistency and security. This
improves protection against prototype pollution and aligns with the
primordials pattern used throughout the codebase.

Author: Ayoub-Mabrouk

lib/internal/test_runner/utils.js

@@ -431,7 +431,7 @@ function formatLinesToRanges(values) {
     if ((index > 0) && ((current - array[index - 1]) === 1)) {
       prev[prev.length - 1][1] = current;
     } else {
-      prev.push([current]);
+      ArrayPrototypePush(prev, [current]);
     }
     return prev;
   }, []), (range) => ArrayPrototypeJoin(range, '-'));