Replace setup.py with pyproject.toml (#9021)

* Create pyproject.toml
* Implement a custom build backend (see below) in packager directory. Build logic from setup.py has been refactored and migrated into the new backend.
* Tested: pip wheel . (build wheel), python -m build --sdist . (source distribution)

tests/ci_build/conda_env/python_lint.yml

@@ -18,6 +18,7 @@ dependencies:
 - cloudpickle
 - pytest
 - hypothesis
+- hatchling
 - pip:
   # TODO: Replace it with pyspark>=3.4 once 3.4 released.
   - https://ml-team-public-read.s3.us-west-2.amazonaws.com/pyspark-3.4.0.dev0.tar.gz