DM-38814: Drop obscore manager from config when making execution butler

[andy-slac]

The fix is one additional line executionButlerBuilder.py, the rest is
a new unit test to reproduce the problem with execution butler and obscore.

Also needs lsst/daf_butler#826

Checklist

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

[codecov]

Codecov Report

Patch coverage: 90.62% and project coverage change: +1.20 🎉

Comparison is base (17525e2) 80.60% compared to head (9e8c167) 81.81%.

❗ Current head 9e8c167 differs from pull request most recent head cc85667. Consider uploading reports for the commit cc85667 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #321      +/-   ##
==========================================
+ Coverage   80.60%   81.81%   +1.20%     
==========================================
  Files          57       58       +1     
  Lines        6450     6477      +27     
  Branches     1323     1327       +4     
==========================================
+ Hits         5199     5299     +100     
+ Misses       1002      911      -91     
- Partials      249      267      +18     

Impacted Files	Coverage Δ
tests/test_executionButler.py	87.50% <87.50%> (ø)
python/lsst/pipe/base/executionButlerBuilder.py	69.71% <100.00%> (+54.11%)	⬆️
python/lsst/pipe/base/tests/simpleQGraph.py	71.97% <100.00%> (+0.36%)	⬆️

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[timj]

Thanks