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

tests/test_logs_cli_resolve_nonstring.py

@@ -4,22 +4,10 @@
 (e.g. None) raised TypeError once any *.log file existed. Non-strings now
 return None (no match).
 """
-import importlib.machinery
-import importlib.util
-from pathlib import Path
-
-ROOT = Path(__file__).resolve().parents[1]
-
-
-def _load():
-    loader = importlib.machinery.SourceFileLoader("odysseus_logs_cli", str(ROOT / "scripts" / "odysseus-logs"))
-    spec = importlib.util.spec_from_loader(loader.name, loader)
-    m = importlib.util.module_from_spec(spec)
-    loader.exec_module(m)
-    return m
+from tests.helpers.cli_loader import load_script
 
 
 def test_non_string_name_returns_none():
-    cli = _load()
+    cli = load_script("odysseus-logs")
     assert cli._resolve(None) is None
     assert cli._resolve(123) is None