http2 POST requests deadlock, wrong queryParameters serialization

[lglapinski]

1. Is this a client library issue or a product issue?
   Client library issue

2. Did someone already solve this?
   No

3. Do you have a support contract?
   No

Environment details

• OS: MacOs 12.5.1
• Node.js version: 16.16.0 LTS
• npm version: 8.14.0
• googleapis-common version: 6.0.1

Steps to reproduce

1. Set Gmail API options to use http2 request
2. Call gmailApi.users.threads.modify with valid parameters.
3. Observe app being #deadlocked
4. Notice query parameter removeLabelIds[]=... instead of removeLabelIds=...&removeLabelIds=...

Solution proposals

Solution to deadlock is to change this lines into

if (config.data) {
      if (config.data instanceof stream_1.Stream) {
          config.data.pipe(req);
      }
      else if (typeof config.data === 'string') {
          const data = Buffer.from(config.data);
          req.write(data);
      }
      else if (typeof config.data === 'object') {
          const data = JSON.stringify(config.data);
          req.write(data);
      } 
}
req.end();

Solution for wrong queryParameters serialization is to change this line into const q = opts.paramsSerializer(opts.params);