Optionally calculate simple utility bills

[joseph-robertson]

Pull Request Description

Closes #890.

Similar to emissions section in yml, use:

    utility_bills:
      - scenario_name: Net Metering w/ Wholesale Excess Rate
        elec_fixed_charge: 10.0
        elec_marginal_rate: 0.12
        ...
      - scenario_name: Net Metering w/ Retail Excess Rate
        ...
      - scenario_name: Feed-In Tariff
      ...

TODO:

• Expose more arguments (e.g., fixed charges, marginal rates, PV arguments)
• Update and test bsb workflow generator Optionally calculate simple utility bills buildstockbatch#303

Checklist

Not all may apply:

• Tests (and test files) have been updated
• Documentation has been updated
• Changelog has been updated
• openstudio tasks.rb update_measures has been run
• No unexpected regression test changes on CI (checked comparison artifacts)