Python: Use Maturin to build SDKs (#2025)

* Remove `lib` prefix from generated module names

* Build Pokemon service with `Maturin`

* Fix Maturin build on CI

* Generate minimal `pyproject.toml` for generated SDKs to build from source using Maturin

* Fix `ktlint` issues

* Bring back type stubs for Pokemon service

* Update instructions for Lambda

* Make `build-wheel` and `build-wheel-release` to depend on `codegen`