split one test into three

(I am trying to debug the third one on the Mac, and this makes it easier.)

mpsd-software-environment.py

@@ -267,6 +267,7 @@ def create_dir_structure(mpsd_release: str, script_dir: Path) -> None:
                 )
             run(["git", "pull"])
 
+
 def get_release_info(mpsd_release: str, script_dir: Path) -> Tuple[str, str, List[str]]:
     """
     Get information about the specified release.