Shadow Realms: Check the function prototype of all points of wrapping

[philomates]

Expanding the test added in #3230 to cover all points at which wrapping occurs in the Shadow Realm proposal.
I think I got the caller/target realm expectations correct, but definitely worth a close review

As a side note, I'm having some issues adapting the JSC implementation to satisfy this test and was offhand wondering: how important is the detail that the wrapped function's prototype pertains to the caller realm and not the target realm to the behavior of the feature?

cc/ @legendecas @rwaldron @leobalter

[leobalter]

The devil is in the details.

Thanks for adding these assertions, @philomates! It's important for the wrapped functions to never leak objects from a different realm. This is a solution to match requirements to move this to Stage 3 at TC39.

I'm glad you're working on this!