Add list option in Measurement Client generator

Problem to Solve

It would be beneficial to view the list of registered measurements in the Measurement Plugin Client Generator. Please refer to this thread for more details.

Proposed Solution

• Add a new option to create_client command.

  @optgroup.option(
      "-l",
      "--list-all-measurements",
      is_flag=True,
      help="Lists all registered measurements.",
  )
  

• Use get_all_registered_measurement_info in _support.py to get the registered measurements from the Discovery Service.

  _, measurement_display_names = get_all_registered_measurement_info(discovery_client)
  print("\nList of registered measurements:")
  for index, display_name in enumerate(measurement_display_names, start=1):
        print(f"{index}. {display_name}")
  

AB#2863168

Start by locating the create_client command and the _support.py entry point for get_all_registered_measurement_info. Review how command options are defined and how the Discovery Service is accessed. Done means the new --list-all-measurements option lists registered measurement display names with their numbered output.