DM-52345: Adjust import path for Butler expression code

[dhirving]

Update the import paths for expression parsing modules.

The old registry query system was dropped from daf_butler, and modules related to query expression parsing have been moved to a different part of the file tree.

Checklist

• ran Jenkins
• ran and inspected package-docs build
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.91%. Comparing base (0ed9ceb) to head (a853688).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #528      +/-   ##
==========================================
- Coverage   88.93%   88.91%   -0.02%     
==========================================
  Files         150      150              
  Lines       20634    20634              
  Branches     2456     2456              
==========================================
- Hits        18350    18347       -3     
- Misses       1702     1703       +1     
- Partials      582      584       +2     

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