Set up testing and wheels for Windows on GitHub Actions (#8131)

* Move some Java tests into ci.sh

* Move C++ worker tests into ci.sh

* Define run()

* Prepare to move Python tests into ci.sh

* Fix issues in install-dependencies.sh

* Reload environment for GitHub Actions

* Move wheels to ci.sh and fix related issues

* Don't bypass failures in install-ray.sh anymore

* Make CI a little quieter

* Move linting into ci.sh

* Add vitals test right after build

* Fix os.uname() unavailability on Windows

Co-authored-by: Mehrdad <noreply@github.com>

python/ray/reporter.py

@@ -252,7 +252,7 @@ if __name__ == "__main__":
             args.redis_address, password=args.redis_password)
         traceback_str = ray.utils.format_error_message(traceback.format_exc())
         message = ("The reporter on node {} failed with the following "
-                   "error:\n{}".format(os.uname()[1], traceback_str))
+                   "error:\n{}".format(socket.gethostname(), traceback_str))
         ray.utils.push_error_to_driver_through_redis(
             redis_client, ray_constants.REPORTER_DIED_ERROR, message)
         raise e