Release version 8.2.0

[Rowlando13]

Release of 8.2.0 was tried initially but did not complete since there we needed a large merge with a lot of conflicts from stable into main. The resolution is #2873 .
The checklist:

• Decide to make a release.
• Ensure the change log has entries for each user-facing non-docs change, with links to the related issue reports.
• Ensure each issue and PR is in the milestone.
• Create a release-A.B.C branch.
• Change "Unreleased" to "Released YYYY-MM-DD" in CHANGES.md.
• Remove the ".dev" suffix from the version in pyproject.toml.
• Commit git commit -am 'release version A.B.C' and create a PR.
• Tag git tag -am 'release version A.B.C' A.B.C and push git push origin A.B.C.
• Watch the tests pass and build jobs begin.
• Edit the generated draft release page with our standard message template.
• Approve the upload job.
• Merge the PR. Use "create a merge commit", not "squash" or "rebase"!
• Close the milestone.
• Publish the draft release page.
• Start the next version(s), creating a change log section, bumping the version in pyproject.toml with the .dev suffix.
• Done!

[Rowlando13]

All of the code work for release is done. Needs a final check that everything is added to the milestone and that any breaking changes are clearly annotated.

[Rowlando13]

Reviewed milestones entries through #2630.

[Rowlando13]

All milestones entries reviewed.