Previously we would always calculate these instructions ownership dynamically
when asked and rely on the ownership verifier to catch if we made any
mistakes. Instead with this commit we move to a more static model where the
ownership that these instructions can take are frozen on construction. This is a
more static model that simplifies the ownership model.
I also eliminated a few asserts that are enforced in other places that caused
problems when parsing since we may not have a Function while Parsing (it was
generally asserts if a type was trivial).
