1) Finish removing pin-count based APIs. We need to know the pin names
as well, not just the count.
2) Fix a bug in the regexp for SPICE functions to allow both lowercase
and uppercase function names
3) Move CreatePins() overrides to the new API so that we get pins on
raw SPICE models.
Fixes https://gitlab.com/kicad/code/kicad/issues/13190