llvmlite 0.40.0 Checklist

[sklam]

llvmlite 0.40.0

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

Post release

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