DM-40002: Support pydantic v2

[timj]

Requires lsst/daf_butler#866

Checklist

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

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.05 🎉

Comparison is base (3517803) 82.70% compared to head (cc509f0) 82.75%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #357      +/-   ##
==========================================
+ Coverage   82.70%   82.75%   +0.05%     
==========================================
  Files          66       66              
  Lines        7268     7255      -13     
  Branches     1418     1301     -117     
==========================================
- Hits         6011     6004       -7     
+ Misses       1008     1002       -6     
  Partials      249      249              

Impacted Files	Coverage Δ
python/lsst/pipe/base/_task_metadata.py	97.57% <100.00%> (+0.93%)	⬆️
python/lsst/pipe/base/graph/quantumNode.py	85.96% <100.00%> (+1.34%)	⬆️
...ython/lsst/pipe/base/tests/mocks/_storage_class.py	51.77% <100.00%> (+0.38%)	⬆️

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[andy-slac]

Looks good.