Replace deprecated ansi param usage with colors param in logging

[yousefmoazzam]

As-per the advice given when running tests:

============================================ warnings summary============================================
tests/method_wrappers/test_rotation.py: 16 warnings
  /httomo/httomo/utils.py:60: DeprecationWarning: The 'ansi' parameter is deprecated, please use 'colors' instead
    logger.opt(ansi=True).info("<yellow>{}</yellow>".format(output))

tests/method_wrappers/test_rotation.py::test_rotation_180
tests/method_wrappers/test_rotation.py::test_rotation_360
  /httomo/httomo/method_wrappers/rotation.py:191: RuntimeWarning: Mean of empty slice.
    flats1d = 1.0 if flats is None else flats.mean(0, dtype=np.float32)

tests/method_wrappers/test_rotation.py::test_rotation_180
tests/method_wrappers/test_rotation.py::test_rotation_360
  /opt/conda/lib/python3.10/site-packages/numpy/core/_methods.py:182: RuntimeWarning: invalid value encountered in divide
    ret = um.true_divide(

tests/method_wrappers/test_rotation.py::test_rotation_180
tests/method_wrappers/test_rotation.py::test_rotation_360
  /httomo/httomo/method_wrappers/rotation.py:192: RuntimeWarning: Mean of empty slice.
    darks1d = 0.0 if darks is None else darks.mean(0, dtype=np.float32)

tests/runner/test_task_runner.py: 16 warnings
  /httomo/httomo/utils.py:58: DeprecationWarning: The 'ansi' parameter is deprecated, please use 'colors' instead
    logger.opt(ansi=True).info("<green>{}</green>".format(output))

tests/runner/test_task_runner.py: 16 warnings
  /httomo/httomo/utils.py:62: DeprecationWarning: The 'ansi' parameter is deprecated, please use 'colors' instead
    logger.opt(ansi=True).info("<magenta>{}</magenta>".format(output))

tests/runner/test_task_runner.py::test_does_reslice_when_needed_and_reports_time
  /httomo/httomo/utils.py:56: DeprecationWarning: The 'ansi' parameter is deprecated, please use 'colors' instead
    logger.opt(ansi=True).info("<cyan>{}</cyan>".format(output))

tests/runner/test_task_runner.py::test_does_reslice_when_needed_and_reports_time
  /httomo/httomo/utils.py:64: DeprecationWarning: The 'ansi' parameter is deprecated, please use 'colors' instead
    logger.opt(ansi=True).info("<red>{}</red>".format(output))

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html