Convert UpgradeCosts measure to ModelMeasure

[joseph-robertson]

Pull Request Description

UpgradeCosts does not need to be a reporting measure; it doesn't actually report any simulation output. ReportHPXMLOutput does not need to be its own measure; it can be pulled into UpgradeCosts.

If UpgradeCosts becomes a model measure, it gets applied before simulation time and therefore its registered values would show up in the results.csv when using the measures_only flag.

Companion PR: https://github.com/NREL/buildstockbatch/pull/455

Checklist

Not all may apply:

• [x] Tests (and test files) have been updated
• [x] Documentation has been updated
  • [ ] ~If related to resstock-estimation, checklist includes data dictionary, source report, options saturation, options_lookup.~
• [ ] ~Changelog has been updated~
• [x] openstudio tasks.rb update_measures has been run
• [x] No unexpected regression test changes on CI (checked comparison artifacts)