Add list option in Measurement Client generator

[MounikaBattu17]

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