DM-54912: Add photometric_scaling component to VisitImage.

[TallJimbo]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes
• (if changing dimensions.yaml) make a copy of the updated dimensions.yaml in configs/old_dimensions and update the list in doc/lsst.daf.butler/dimensions.rst

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.61%. Comparing base (c792fb9) to head (1463cbe).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1372   +/-   ##
=======================================
  Coverage   89.61%   89.61%           
=======================================
  Files         373      373           
  Lines       50776    50776           
  Branches     5913     5913           
=======================================
  Hits        45505    45505           
  Misses       3880     3880           
  Partials     1391     1391           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[natelust]

Same comment as other branch, I am not a fan of this name unless I am not understanding it.

[TallJimbo]

I think we covered this on the other PR, but there was a misunderstanding: this storage class is for an arbitrary lsst.images.fields.Field, not anything specific to photometric scaling. It's possible it's still not a great name ("field" is heavily overloaded in some contexts), but I'm not going to try to change it on this ticket. I'm compiling a list of things to bring to #dm-naming-things and will include it there.