Move test_utils to util package

test/solidlsp/swift/test_swift_basic.py

@@ -11,7 +11,7 @@ import platform
 import pytest
 
 from serena.project import Project
-from serena.text_utils import LineType
+from serena.util.text_utils import LineType
 from solidlsp import SolidLanguageServer
 from solidlsp.ls_config import Language
 from test.conftest import is_ci