minor: duplicated functionality for invoking cli commands on BaseAEATestCase

[Karrenbelt]

There are two different methods for running cli commands on the BaseAEATestCase, we may opt to deprecate one.

open-aea/aea/test_tools/test_cases.py

Lines 183 to 211 in a5816bf

	@classmethod
	def run_cli_command(cls, *args: str, cwd: str = ".", **kwargs: str) -> Result:
	"""
	Run AEA CLI command.
	:param args: CLI args
	:param cwd: the working directory from where to run the command.
	:param kwargs: other keyword arguments to click.CliRunner.invoke.
	:raises AEATestingException: if command fails.
	:return: Result
	"""
	with cd(cwd):
	result = cls.runner.invoke(
	cli,
	[*CLI_LOG_OPTION, *args],
	standalone_mode=False,
	catch_exceptions=False,
	**kwargs,
	)
	cls.last_cli_runner_result = result
	if result.exit_code != 0: # pragma: nocover
	raise AEATestingException(
	"Failed to execute AEA CLI command with args {}.\n"
	"Exit code: {}\nException: {}\n{}".format(
	args, result.exit_code, result.exception, result.output
	)
	)
	return result

open-aea/aea/test_tools/test_cases.py

Lines 932 to 939 in a5816bf

	@classmethod
	def invoke(cls, *args: str) -> Result:
	"""Call the cli command."""
	with cd(cls._get_cwd()):
	result = cls.runner.invoke(
	cli, args, standalone_mode=False, catch_exceptions=False
	)
	return result

[DavidMinarsch]

Would be good to understand which one is used more and which one we "prefer".