Uncomment and fix Persian time parsing test cases

The commented-out test cases in `test/parse_tests/test_parse_fa.py` should be fixed and uncommented. These test cases cover important Persian time parsing functionality that are not tested by other active test cases. See the discussion in PR #51: https://github.com/OpenVoiceOS/ovos-date-parser/pull/51#discussion_r1832093961.\n\nRequested by @JarbasAl.