src: elevate v8 namespaces

elevate v8 namespaces. Leverage `using` semantics
for repeated usage of v8 artifacts.

PR-URL: #32872
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Zeyu Yang <himself65@outlook.com>

src/cares_wrap.cc

@@ -66,6 +66,7 @@ using v8::Int32;
 using v8::Integer;
 using v8::Isolate;
 using v8::Local;
+using v8::NewStringType;
 using v8::Null;
 using v8::Object;
 using v8::String;
@@ -1929,7 +1930,7 @@ void CanonicalizeIP(const FunctionCallbackInfo<Value>& args) {
   const int af = (rc == 4 ? AF_INET : AF_INET6);
   CHECK_EQ(0, uv_inet_ntop(af, &result, canonical_ip, sizeof(canonical_ip)));
   Local<String> val = String::NewFromUtf8(isolate, canonical_ip,
-      v8::NewStringType::kNormal).ToLocalChecked();
+      NewStringType::kNormal).ToLocalChecked();
   args.GetReturnValue().Set(val);
 }