revert marking some files as unexecutable (#32613)

* this is not a test

* these are not tests!

selfdrive/debug/test_fw_query_on_routes.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # type: ignore
 
 from collections import defaultdict

selfdrive/test/process_replay/test_processes.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import argparse
 import concurrent.futures
 import os

tools/car_porting/test_car_model.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import argparse
 import sys
 import unittest # noqa: TID251