Drop Python 3.8 & Add Support for Python 3.12

[ttqureshi]

• resolves: Drop Python 3.8 & Add Support for Python 3.12 #217

[ttqureshi]

@feanil The tox command runs successfully for python3.11. But for python 3.12 it fails with the following error log. I believe the helper functions defined in utils.py need to be moved to setup.py. But this would make setup.py much bigger.
What are you thoughts and suggestions on it?

Error Log:

  │ exit code: 1
  ╰─> [20 lines of output]
      Traceback (most recent call last):
        File "/home/runner/work/cc2olx/cc2olx/.tox/formatting/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
          main()
        File "/home/runner/work/cc2olx/cc2olx/.tox/formatting/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/runner/work/cc2olx/cc2olx/.tox/formatting/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
          return hook(config_settings)
                 ^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-qtw9qvne/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 331, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-qtw9qvne/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line [30](https://github.com/openedx/cc2olx/actions/runs/14732414690/job/41424187947?pr=264#step:5:31)1, in _get_build_requires
          self.run_setup()
        File "/tmp/pip-build-env-qtw9qvne/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 512, in run_setup
          super().run_setup(setup_script=setup_script)
        File "/tmp/pip-build-env-qtw9qvne/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line [31](https://github.com/openedx/cc2olx/actions/runs/14732414690/job/41424187947?pr=264#step:5:32)7, in run_setup
          exec(code, locals())
        File "<string>", line 6, in <module>
      ModuleNotFoundError: No module named 'utils'
      [end of output]```
      

[feanil]

@ttqureshi I think it's fine to move all the contents of utils.py into setup.py. Long term we'll need to replace the setup.py with a pyproject.toml anyway so having it be self-contained for now is not a problem. We add similar functions in most of our other setup.py files so it's also not a new pattern to do so here.