misc tidyings from another branch (#24406)

pulled out of https://github.com/oven-sh/bun/pull/21809

- brings the ASAN behavior on linux closer in sync with macos
- fixes some tests to also pass in node

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

scripts/runner.node.mjs

@@ -81,6 +81,7 @@ function getNodeParallelTestTimeout(testPath) {
     return 90_000;
   }
   if (!isCI) return 60_000; // everything slower in debug mode
+  if (options["step"]?.includes("-asan-")) return 60_000;
   return 20_000;
 }
 
@@ -1579,8 +1580,7 @@ function isJavaScriptTest(path) {
  * @returns {boolean}
  */
 function isNodeTest(path) {
-  // Do not run node tests on macOS x64 in CI
-  // TODO: Unclear why we decided to do this?
+  // Do not run node tests on macOS x64 in CI, those machines are slow and expensive.
   if (isCI && isMacOS && isX64) {
     return false;
   }