kedro mlflow init displays a wrong sucess message when the env folder does not exist

[Galileo-Galilei]

Description

When running kedro mlflow init --env=xxx, a success message is displayed even if the env "xxx" folder does not exist, instead of an error message. We should move this code :

kedro-mlflow/kedro_mlflow/framework/cli/cli.py

Lines 116 to 122 in d31820a

	if not silent:
	click.secho(
	click.style(
	f"'{settings.CONF_SOURCE}/{env}/{mlflow_yml}' successfully updated.",
	fg="green",
	)
	)

inside the "try" block above.