integration test driver: Adapt test script checking output

nixos/lib/testing/driver.nix

@@ -65,7 +65,8 @@ let
           echo "${builtins.toString vlanNames}" >> testScriptWithTypes
           echo -n "$testScript" >> testScriptWithTypes
 
-          cat -n testScriptWithTypes
+          echo "Running type check (enable/disable: config.skipTypeCheck)"
+          echo "See https://nixos.org/manual/nixos/stable/#sec-test-options-reference"
 
           mypy  --no-implicit-optional \
                 --pretty \
@@ -79,6 +80,9 @@ let
 
         ${testDriver}/bin/generate-driver-symbols
         ${lib.optionalString (!config.skipLint) ''
+          echo "Linting test script (enable/disable: config.skipLint)"
+          echo "See https://nixos.org/manual/nixos/stable/#sec-test-options-reference"
+
           PYFLAKES_BUILTINS="$(
             echo -n ${lib.escapeShellArg (lib.concatStringsSep "," pythonizedNames)},
             < ${lib.escapeShellArg "driver-symbols"}