Reduce required inputs for ModelChain.run_model_from_effective_irradiance

[cwhanse]

ModelChain.run_model_from_effective_irradiance requires that the ModelChain instance has attributes which the method doesn't use, e.g., ModelChain.aoi_model. It would be nice if the method runs without requiring these attributes.

"It's a small inelegance that specifying aoi_model is necessary for a ModelChain that only uses run_model_from_effective_irradiance. I don't see a way around it, so I don't think there's anything to be done in this PR, just thinking out loud about the ModelChain design."

Originally posted by @kanderso-nrel in #1394 (comment)

[wholmgren]

It would be nice if the method runs without requiring these attributes.

Isn't the problem that the method must be specified when the ModelChain object is instantiated? If so, a better design might be different ModelChain classes such as ModelChain3Component, and ModelChainEffectiveIrradiance. Then each would have its own run_model rather than run_model_.*. Of course that's a pretty substantial API change and may or may not be worth it. Setting different defaults and raising errors at runtime if needed would be a relatively small change, but is less consistent with one of the original goals of ModelChain (if you can build it, you can run it).

[cwhanse]

Isn't the problem that the method must be specified when the ModelChain object is instantiated?

Yes, and please feel at liberty to edit the issue title and description.