Added support for pydantic v2 and fixed build issues, building packages with yaml files.

[varunmittal91]

This pull request resolves compatibility issues with focus-converter.

Also the python package built did not include yaml due to them being soft-links. This changes soft-linked files to hard links.

[mike-finopsorg]

@varunmittal91 can you check the unittests on this one. I see an error
FAILED tests/config_objects/test_check_type_friendly_name.py::TestCheckTypeFriendlyName::test_generate_name_for_check_types - polyfactory.exceptions.ConfigurationException: Model type Rule is not supported. To support it, register an appropriate base factory and subclass it for your factory.

[varunmittal91]

@varunmittal91 can you check the unittests on this one. I see an error FAILED tests/config_objects/test_check_type_friendly_name.py::TestCheckTypeFriendlyName::test_generate_name_for_check_types - polyfactory.exceptions.ConfigurationException: Model type Rule is not supported. To support it, register an appropriate base factory and subclass it for your factory.

All done, also removed pkg_resource warning by moving to importlib. Python 3.8 will still need to use the old api.