test: improve disable AsyncLocalStorage test

PR-URL: #31998
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Vladimir de Turckheim <vlad2t@hotmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: puzpuzpuz

test/async-hooks/test-async-local-storage-enable-disable.js

@@ -9,6 +9,9 @@ asyncLocalStorage.runSyncAndReturn(new Map(), () => {
   asyncLocalStorage.getStore().set('foo', 'bar');
   process.nextTick(() => {
     assert.strictEqual(asyncLocalStorage.getStore().get('foo'), 'bar');
+    process.nextTick(() => {
+      assert.strictEqual(asyncLocalStorage.getStore(), undefined);
+    });
     asyncLocalStorage.disable();
     assert.strictEqual(asyncLocalStorage.getStore(), undefined);
     process.nextTick(() => {