Get exact class during devirtualization (#45526)

Get exact class during devirtualization (#45526)

If we devirtualize to a method on a generic class, try and obtain the
exact class. Pass this back to the jit to unblock some types of inlines.

Also refactor how information is passed during devirtualization in
anticipation of follow on work to devirtualize default interface methods.
Because there are now multiple inputs and outputs, convey everything
using a struct.

Resolves #38477.