Move error handling tests to vcs-versioning

Move setuptools-scm/testing_scm/test_better_root_errors.py to vcs-versioning/testing_vcs/test_better_root_errors.py since it tests core vcs-versioning error handling.

Note: File finder tests (test_file_finder.py) remain in setuptools-scm because file finding is setuptools integration (setuptools.file_finders entry points), not core VCS functionality.

All tests pass: 407 passed, 10 skipped, 1 xfailed

Author: RonnyPfannschmidt

…m/testing_scm/test_better_root_errors.py …g/testing_vcs/test_better_root_errors.pysetuptools-scm/testing_scm/test_better_root_errors.py renamed to vcs-versioning/testing_vcs/test_better_root_errors.py setuptools-scm/testing_scm/test_better_root_errors.py renamed to vcs-versioning/testing_vcs/test_better_root_errors.py

@@ -9,14 +9,10 @@
 from __future__ import annotations
 
 import pytest
-
-from vcs_versioning._get_version_impl import _find_scm_in_parents
-from vcs_versioning._get_version_impl import _version_missing
+from setuptools_scm import Configuration, get_version
+from vcs_versioning._get_version_impl import _find_scm_in_parents, _version_missing
 from vcs_versioning.test_api import WorkDir
 
-from setuptools_scm import Configuration
-from setuptools_scm import get_version
-
 # No longer need to import setup functions - using WorkDir methods directly