Move test structures out of util directory

pymatgen/util/testing/__init__.py

@@ -24,9 +24,8 @@
     from collections.abc import Sequence
     from typing import Any, ClassVar
 
-MODULE_DIR = Path(__file__).absolute().parent
-STRUCTURES_DIR = MODULE_DIR / ".." / "structures"
 TEST_FILES_DIR = Path(SETTINGS.get("PMG_TEST_FILES_DIR", f"{ROOT}/tests/files"))
+STRUCTURES_DIR = TEST_FILES_DIR / "structures"
 VASP_IN_DIR = f"{TEST_FILES_DIR}/io/vasp/inputs"
 VASP_OUT_DIR = f"{TEST_FILES_DIR}/io/vasp/outputs"
 # fake POTCARs have original header information, meaning properties like number of electrons,