Add flake8 comprehensions checks to pre-commit & CI (#48111)

tests/common.py

@@ -766,7 +766,7 @@ class MockConfigEntry(config_entries.ConfigEntry):
 def patch_yaml_files(files_dict, endswith=True):
     """Patch load_yaml with a dictionary of yaml files."""
     # match using endswith, start search with longest string
-    matchlist = sorted(list(files_dict.keys()), key=len) if endswith else []
+    matchlist = sorted(files_dict.keys(), key=len) if endswith else []
 
     def mock_open_f(fname, **_):
         """Mock open() in the yaml module, used by load_yaml."""