Fix/remove TODO in is_lock_free tests. NFC (#26649)

Returning true here is apparently the correct behavior.

See https://issues.chromium.org/issues/40742723

Author: sbc100

test/pthread/is_lock_free.c

@@ -15,9 +15,7 @@ void test() {
   assert(emscripten_atomics_is_lock_free(1));
   assert(emscripten_atomics_is_lock_free(2));
   assert(emscripten_atomics_is_lock_free(4));
-  // Chrome is buggy, see
-  // https://bugs.chromium.org/p/chromium/issues/detail?id=1167449
-  //assert(emscripten_atomics_is_lock_free(8));
+  assert(emscripten_atomics_is_lock_free(8));
   assert(!emscripten_atomics_is_lock_free(16));
   assert(!emscripten_atomics_is_lock_free(31));
 

test/wasm_worker/hardware_concurrency_is_lock_free.c

@@ -11,9 +11,7 @@ void test() {
   assert(emscripten_atomics_is_lock_free(1));
   assert(emscripten_atomics_is_lock_free(2));
   assert(emscripten_atomics_is_lock_free(4));
-  // Chrome is buggy, see
-  // https://bugs.chromium.org/p/chromium/issues/detail?id=1167449
-  //assert(emscripten_atomics_is_lock_free(8));
+  assert(emscripten_atomics_is_lock_free(8));
   assert(!emscripten_atomics_is_lock_free(16));
   assert(!emscripten_atomics_is_lock_free(31));