test: Add test for file system permissions

test/functional/test_runner.py

@@ -211,6 +211,7 @@ BASE_SCRIPTS = [
     'p2p_addrv2_relay.py',
     'p2p_compactblocks_hb.py',
     'p2p_disconnect_ban.py',
+    'feature_posix_fs_permissions.py',
     'rpc_decodescript.py',
     'rpc_blockchain.py',
     'rpc_deprecated.py',