llvmlite 0.40.0 Checklist

[sklam]

llvmlite 0.40.0

• Cherry-pick items from the 0.40.0 milestone into a PR.
  • Cherrypicks for release 0.40.0 final #938
• Approve change log modifications (Update CHANGE_LOG for 0.40.0 final. #940) and cherry-pick.
• Merge change log modifications and cherry-picks to X.Y release branch.
  • Cherrypicks for release 0.40.0 final #938
• Annotated tag v0.40.0 on release branch (llvmlite tags DO have a v prefix).
• Build and upload conda packages on buildfarm (check "upload"). llvmlite_205
• Build wheels and sdist on the buildfarm (check "upload"). llvmlite_wheel_44
• Verify packages uploaded to Anaconda Cloud and move to numba/label/main.
• Upload wheels and sdist to PyPI. (upload from ci_artifacts).
• Verify wheels for all platforms arrived on PyPi. https://pypi.org/project/llvmlite/0.40.0/
• Verify ReadTheDocs build.
• Send RC/FINAL announcement email / post announcement to discourse group.
• Post link to Twitter. https://twitter.com/numba_jit/status/1653448978430558218

Post release

• Clean up ci_artifacts by moving files to subdirectories
• Update release checklist template.
• Ping Anaconda Distro team to trigger a build for defaults (FINAL ONLY).
• Close milestone (and then close this release issue).