[17.0][MIG] mail_tracking: Migration to 17.0

[chienandalu]

WIP

Not usable at this moment:

• [ ] refactor discuss stuff
• [ ] refactor thread stuff
• [ ] fix tests

cc @Tecnativa TT49060

[pedrobaeza]

/ocabot migration mail_tracking

[pedrobaeza]

Please squash a bit administrative commits.

[Bart-dh]

Hi @chienandalu is this safe to use for production environments already?

[chienandalu]

Hi @chienandalu is this safe to use for production environments already?

It should be ready by now.

[pedrobaeza]

/ocabot merge nobump

[OCA-git-bot]

This PR looks fantastic, let's merge it! Prepared branch 17.0-ocabot-merge-pr-1367-by-pedrobaeza-bump-nobump, awaiting test results.

[OCA-git-bot]

Congratulations, your PR was merged at 2d458df82a4761d76fa907068d606409f8284236. Thanks a lot for contributing to OCA. ❤️