Numba 0.56.0 Checklist

[sklam]

numba 0.56.0

• merge CUDA: Make numba.cuda.tests.doc_examples.ffi a module to fix #8252 #8255
• Cherry-pick items from the 0.56.0 milestone into a PR.
  • Cherry pick #8255 #8269
• Update the "version support table" in the documentation with the final
  release date (FINAL ONLY).
  • Make, approve and merge PR against the 0.56 release branch. (Update version support table doc for 0.56. #8274, but it's against main).
  • Create a cherry-pick PR of the above against release branch. (Cherry pick for 0.56 release #8279)
• Approve change log modifications and cherry-pick (Update CHANGE_LOG for 0.56.0 final #8275).
• Merge change log modifications and cherry-picks to X.Y release branch.
  • Cherry pick for 0.56 release #8279
• [ ] Review, merge and check execution of release notebook. (FINAL ONLY)
• Annotated tag 0.56.0 on release branch (no v prefix).
• Build and upload conda packages on buildfarm (check upload).
• Build wheels and sdist on the buildfarm (check "upload").
• Verify packages uploaded to Anaconda Cloud and move to
  numba/label/main.
  • https://anaconda.org/numba/numba/files?version=0.56.0
• Upload wheels and sdist to PyPI (upload from ci_artifacts).
  • https://pypi.org/project/numba/#files
• Verify wheels for all platforms arrived on PyPi.
• Verify ReadTheDocs build.
  • https://numba.readthedocs.io/en/0.56.0/
• Post link to Twitter.
  • https://twitter.com/numba_jit/status/1551878781102690304
• Post announcement to discourse group
  • https://numba.discourse.group/t/ann-numba-0-56-0/1461
• Post link to python-announce-list@python.org.
  • https://mail.python.org/archives/list/python-announce-list@python.org/thread/RMTHNAIUEJ7YX57QOQXGO4U4BVEJRLDH/

Post release

• Snapshot Build Farm config
• Clean up ci_artifacts by moving files to subdirectories
• Update release checklist template with any additional bullet points that
  may have arisen during the release.
  • update checklist #8292
• Ping Anaconda Distro team to trigger a build for defaults (FINAL ONLY).
• Create a release on Github at https://github.com/numba/numba/releases (FINAL ONLY).
  • https://github.com/numba/numba/releases/tag/0.56.0
• Close milestone (and then close this release issue).