Add action for porous media solid heat conduction in PINSFV

[GiudGiud]

Reason

Action syntax shortens inputs and reduces user mistakes. It's kind of expected to exist for the solid equation at this point.

Design

In heat conduction module? In NS? In Pronghorn? I'd say NS. It's higher exposure and it's nothing ECed In a separate action or merged in the massive NSFVAction? I d say the former

Impact

Easier user input, happier users, less debugging

@lindsayad @grmnptr @snschune for thoughts / comments

[lindsayad]

I would say that the acronym you used in the issue title implies the answer. I agree that this should be in NS