Run `run_analysis` in parallel

[joseph-robertson]

Pull Request Description

Up-to-date copy of https://github.com/NREL/resstock/pull/1131. Closes #1130.

Checklist

Not all may apply:

• [ ] ~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.~
• [x] Changelog has been updated
• [x] openstudio tasks.rb update_measures has been run
• [x] No unexpected regression test changes on CI (checked comparison artifacts)