Fix: Use correct output and expected files for test comparison

[temphdq]

The file comparison logic within the test library had a bug where both file_out and file_expected were incorrectly assigned the path to the input file (QTEST_INPUT_FILE). This resulted in tests always comparing the input file with itself, rendering the comparison meaningless.

This commit corrects the assignments:

• file_out now points to the actual generated output file.
• file_expected now points to the predefined expected file.

This ensures that the test library accurately verifies the generated output against the expected results.