DM-36410: Support "move" ingest into chained datastore

[timj]

Treat it as a copy and then clean up.

Checklist

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

[codecov]

Codecov Report

Base: 84.80% // Head: 84.81% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (3fadd14) compared to base (07bf668).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #742   +/-   ##
=======================================
  Coverage   84.80%   84.81%           
=======================================
  Files         254      254           
  Lines       32967    32980   +13     
  Branches     5630     5636    +6     
=======================================
+ Hits        27959    27972   +13     
  Misses       3785     3785           
  Partials     1223     1223           

Impacted Files	Coverage Δ
...hon/lsst/daf/butler/datastores/chainedDatastore.py	87.53% <100.00%> (+0.39%)	⬆️
tests/test_butler.py	97.68% <100.00%> (+<0.01%)	⬆️
tests/test_datastore.py	99.28% <100.00%> (ø)

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[andy-slac]

Looks good.