Make dawn.node properties enumerable etc...

Before this change, this code

```
adapter = await navigator.gpu.requestAdapter();
for (const key in adapter) {
  console.log(key);
}
```

In the browser prints

```
features
limits
info
isFallbackAdapter
requestDevice
isCompatibilityMode
featureLevel
```

But in dawn.node prints

```
isFallbackAdapter
isCompatibilityMode
```

After this CL dawn.node prints them all

Bug: 389099880
Change-Id: I846919f955539ca2a9e17555eca5223cc1beb70c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/221755
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Gregg Tavares <gman@chromium.org>
diff --git a/src/dawn/node/interop/WebGPU.cpp.tmpl b/src/dawn/node/interop/WebGPU.cpp.tmpl
index 1e87c73..605e015 100644
--- a/src/dawn/node/interop/WebGPU.cpp.tmpl
+++ b/src/dawn/node/interop/WebGPU.cpp.tmpl
@@ -166,7 +166,7 @@
         InstanceAccessor("size", &W{{$.Name}}::getSize, nullptr),
 {{-  end}}
 {{-  range $m := $methods}}
-        InstanceMethod("{{$m.Name}}", &W{{$.Name}}::{{$m.Name}}, static_cast<napi_property_attributes>(napi_writable | napi_configurable)),
+        InstanceMethod("{{$m.Name}}", &W{{$.Name}}::{{$m.Name}}, static_cast<napi_property_attributes>(napi_default_jsproperty)),
 {{-  end}}
 {{-  range $a := $attributes}}
 {{-   if not (HasAnnotation $a "SameObject")}}
@@ -370,7 +370,7 @@
 {{- range $a := AttributesOf $}}
 {{-   if HasAnnotation $a "SameObject"}}
   object.DefineProperty(Napi::PropertyDescriptor::Value(
-    "{{$a.Name}}", ToJS(env, wrapper->impl->get{{Title $a.Name}}(env))
+    "{{$a.Name}}", ToJS(env, wrapper->impl->get{{Title $a.Name}}(env)), napi_default_jsproperty
   ));
 {{-   end}}
 {{- end}}