sqlline.py or psql.py may hang if they're not invoked from bin folder

In the phoenix_utils.py, we have following code which searching for client jar. If a user invokes sqlline or psql from a root folder, this step will take a while.

  if phoenix_client_jar == "":
    phoenix_client_jar = find("phoenix-*-client*", os.path.join(current_dir, ".."))