Integrate TEAL with Pyomo cost expressions into DISPATCHES workflow

[adowling2]

Goal by June 30, 2022: Extend TEAL to generate Pyomo expressions for costing formulas. Integrate said formulas into the DISPATCHES workflow, starting with the NE case study.

Lead:

Support: @klfrick2 @radhakrishnatg

Outstanding Tasks:

[PaulTalbot-INL]

FYI The changes in TEAL have been merged with idaholab/TEAL#43; we're working on an initial demo for it in the dispatches nuclear case.

[PaulTalbot-INL]

It's worth noting that while we can demo TEAL integration, in order for DISPATCHES users to benefit from this we need RAVEN and TEAL as install dependencies; see #76 and idaholab/raven#1748.

[radhakrishnatg]

TEAL integration is demonstrated in this notebook https://github.com/GabrielSoto-INL/dispatches/blob/tealnb/dispatches/case_studies/nuclear_case/multiperiod_design_pricetaker_wTEAL.ipynb
The deterministic case is working, but the stochastic case needs some tweaking. After everything is fixed, the script containing helper functions will be pushed to dispatches.util folder. The content of the Jupyter notebook will be added to the nuclear case study's price-taker notebook.