Modernize Python build a bit

[TobiX]

Since the usage of setup.py is deprecated, move all configuration into pyproject.toml.

This also cleans up the CI build for PyPI:

• Removes the use of QEMU and replaces it with native aarch64 systems
• Prepare the Python build for Trusted Publishing
• Drop sdist build, it's basically useless anyways...
• Update cibuildwheel

I think more architectures should be easy by just adding the correct runners (see https://docs.github.com/en/actions/how-tos/using-github-hosted-runners/using-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories) to the build matrix.

If you want to add a hand-off publishing pipeline to PyPI, you just need to do 4 things (ignore if too much work):

• Create a PyPI account
• Create sqlite-zstd project
• Enable Trusted Publishing
• Add a trigger on tag in the .github/workflows/pypi_release.yml:

on:
  workflow_dispatch:
  push:
    tags: ["*"]