[wasm] Move asm regress tests into regress/asm

These tests require --validate-asm, which is available only on
WebAssembly enabled builds. This was causing problems
on https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20arm%20-%20sim%20-%20lite/15320/overview.

Moving them into regress/asm, the status file automatically skips these
tests if WebAssembly is not enabled.

Bug: v8:11238
Change-Id: Ib337fb6bd43319f61a33302efd4277c092935a9c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767600
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73489}

test/mjsunit/regress/regress-673241.js

@@ -1,13 +0,0 @@
-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --validate-asm
-
-function generateAsmJs() {
-  'use asm';
-  function fun() { fun(); }
-  return fun;
-}
-
-assertThrows(generateAsmJs());