Mainly internal tokenizer path fix

PiperOrigin-RevId: 810134577

Author: gobbleturk

src/MaxText/pyconfig.py

@@ -580,6 +580,7 @@ def __init__(self, argv: list[str], **kwargs):
           MAXTEXT_REPO_ROOT,
           os.path.join(MAXTEXT_REPO_ROOT, "src", "MaxText"),
           MAXTEXT_PKG_DIR,
+          os.path.dirname(config_name)
       ):
         tokenizer_path = os.path.join(
             search_root,