DM-40057: shorten deprecation timeline and add ticket TODOs

[TallJimbo]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[timj]

Looks good. I think you also want quantum.py which has a "v 27" in it.

[TallJimbo]

Thanks for catching quantum.py. Do you know if we have a removal ticket for that deprecation?

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (4cd0e03) 87.76% compared to head (c476b38) 87.76%.

❗ Current head c476b38 differs from pull request most recent head 58f80da. Consider uploading reports for the commit 58f80da to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #868   +/-   ##
=======================================
  Coverage   87.76%   87.76%           
=======================================
  Files         274      274           
  Lines       36057    36057           
  Branches     7562     7562           
=======================================
  Hits        31645    31645           
  Misses       3241     3241           
  Partials     1171     1171           

Impacted Files	Coverage Δ
python/lsst/daf/butler/_butler.py	78.89% <ø> (ø)
python/lsst/daf/butler/_limited_butler.py	83.58% <ø> (ø)
python/lsst/daf/butler/_quantum_backed.py	88.17% <ø> (ø)
...hon/lsst/daf/butler/core/dimensions/_coordinate.py	87.15% <ø> (ø)
python/lsst/daf/butler/core/dimensions/_packer.py	80.88% <ø> (ø)
...ython/lsst/daf/butler/core/dimensions/_universe.py	88.53% <ø> (ø)
python/lsst/daf/butler/core/quantum.py	87.43% <ø> (ø)
python/lsst/daf/butler/instrument.py	0.00% <ø> (ø)

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[timj]

If you use "fixup" in your commit messages to indicate they will be squashed later you can add this string to thr do-not-merge action.

[TallJimbo]

If you use "fixup" in your commit messages to indicate they will be squashed later you can add this string to the do-not-merge action.

That's a good idea, because that's actually coming from git commit --fixup, so it is a bit of convention.