[OpaquePtr][GlobalOpt] Don't attempt to evaluate global constructors with arguments

Previously all entries in global_ctors had to have the void()* type and
we'd skip evaluating bitcasted functions. With opaque pointers we may
see the function directly.

Fixes #55147.

Reviewed By: #opaque-pointers, nikic

Differential Revision: https://reviews.llvm.org/D124553