test,doc: add missing uv_setup_args() calls

libuv 1.39.0 will begin requiring uv_setup_args() to be called
before attempting to access the process title. This commit adds
uv_setup_args() calls that were missing in order for the test
suite to pass (and updates the documentation).

PR-URL: https://github.com/nodejs/node/pull/34751
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

doc/api/embedding.md

@@ -35,6 +35,7 @@ the `node` and `v8` C++ namespaces, respectively.
 
 ```cpp
 int main(int argc, char** argv) {
+  argv = uv_setup_args(argc, argv);
   std::vector<std::string> args(argv, argv + argc);
   std::vector<std::string> exec_args;
   std::vector<std::string> errors;