refactor(tests): reuse CLI loader in more tests (#2571)

tests/test_odysseus_dispatcher.py

@@ -1,19 +1,8 @@
-import importlib.machinery
-import importlib.util
-from pathlib import Path
-
-
-def _load_dispatcher():
-    path = Path(__file__).resolve().parent.parent / "scripts" / "odysseus"
-    loader = importlib.machinery.SourceFileLoader("odysseus_dispatcher_under_test", str(path))
-    spec = importlib.util.spec_from_loader(loader.name, loader)
-    module = importlib.util.module_from_spec(spec)
-    loader.exec_module(module)
-    return module
+from tests.helpers.cli_loader import load_script
 
 
 def test_is_runnable_subcommand_requires_executable_file(tmp_path):
-    cli = _load_dispatcher()
+    cli = load_script("odysseus")
     sub = tmp_path / "odysseus-demo"
     sub.write_text("#!/bin/sh\n")
     sub.chmod(0o644)