[wasm] Rename wasm::LocalType to wasm::ValueType and kAst* to kWasm*

test/mjsunit/wasm/compiled-module-serialization.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 --allow-natives-syntax --expose-gc
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
 
 (function SerializeAndDeserializeModule() {
   var builder = new WasmModuleBuilder();
   builder.addMemory(1,1, true);
-  var kSig_v_i = makeSig([kAstI32], []);
+  var kSig_v_i = makeSig([kWasmI32], []);
   var signature = builder.addType(kSig_v_i);
   builder.addImport("", "some_value", kSig_i_v);
   builder.addImport("", "writer", signature);
 
   builder.addFunction("main", kSig_i_i)
     .addBody([
       kExprGetLocal, 0,
       kExprI32LoadMem, 0, 0,
       kExprI32Const, 1,
       kExprCallIndirect, signature, kTableZero,
@@ skipping 69 matching lines @@
   var serialized = %SerializeWasmModule(compiled_module);
   var clone = %DeserializeWasmModule(serialized, wire_bytes);
 
   assertNotNull(clone);
   assertFalse(clone == undefined);
   assertFalse(clone == compiled_module);
   assertEquals(clone.constructor, compiled_module.constructor);
   var instance3 = new WebAssembly.Instance(clone);
   assertFalse(instance3 == undefined);
 })();