Remove test directory filter from lint:security target

Author: Nicoretti

exasol/toolbox/nox/_lint.py

@@ -148,7 +148,7 @@ def type_check(session: Session) -> None:
 def security_lint(session: Session) -> None:
     """Runs the security linter on the project"""
     py_files = [f"{file}" for file in python_files(PROJECT_CONFIG.root)]
-    _security_lint(session, list(filter(lambda file: "test" not in file, py_files)))
+    _security_lint(session, py_files)
 
 
 @nox.session(name="lint:dependencies", python=False)