DM-40002: Support pydantic v1 and 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: +0.03 🎉

Comparison is base (1408350) 85.51% compared to head (9517a62) 85.55%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #253      +/-   ##
==========================================
+ Coverage   85.51%   85.55%   +0.03%     
==========================================
  Files          47       47              
  Lines        4247     4244       -3     
  Branches      732      732              
==========================================
- Hits         3632     3631       -1     
+ Misses        461      459       -2     
  Partials      154      154              

Impacted Files	Coverage Δ
python/lsst/ctrl/mpexec/reports.py	100.00% <100.00%> (+3.12%)	⬆️
tests/test_reports.py	100.00% <100.00%> (ø)

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[timj]

I can't really remember why this was never merged, but it was superseded by #255.