gh-109748: Fix again venv test_zippath_from_non_installed_posix() (#110149)

Call also copy_python_src_ignore() on listdir() names.

shutil.copytree(): replace set() with an empty tuple. An empty tuple
becomes a constant in the compiler and checking if an item is in an
empty tuple is cheap.

Lib/shutil.py

@@ -481,7 +481,7 @@ def _copytree(entries, src, dst, symlinks, ignore, copy_function,
     if ignore is not None:
         ignored_names = ignore(os.fspath(src), [x.name for x in entries])
     else:
-        ignored_names = set()
+        ignored_names = ()
 
     os.makedirs(dst, exist_ok=dirs_exist_ok)
     errors = []