[wasm] Reduce usage of old Wasm.* API in JS tests.

test/mjsunit/wasm/verify-function-simple.js

-// Copyright 2015 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: --expose-wasm
-
-load("test/mjsunit/wasm/wasm-constants.js");
-
-try {
-  var data = bytes(
-      kWasmFunctionTypeForm, 0, kAstStmt,  // signature
-      kDeclNoLocals,                       // --
-      kExprNop                             // body
-  );
-
-  Wasm.verifyFunction(data);
-  print("ok");
-} catch (e) {
-  assertTrue(false);
-}
-
-
-var threw = false;
-try {
-  var data = bytes(
-      kWasmFunctionTypeForm, 0, 1, kAstI32,     // signature
-      kDeclNoLocals,                            // --
-      kExprBlock, kAstStmt, kExprNop, kExprNop, kExprEnd  // body
-  );
-
-  Wasm.verifyFunction(data);
-  print("not ok");
-} catch (e) {
-  print("ok: " + e);
-  threw = true;
-}
-
-assertTrue(threw);