[Clang][bytecode] interp__builtin_elementwise_int_binop - use APSInt callback instead of repeated switch statement (#155891)
Users of interp__builtin_elementwise_int_binop are going to be very well
defined, we can use a simple callback mechanism (including existing
llvm::APIntOps static methods) to perform the evaluation and avoid a
repeated switch statement.
Hopefully this will help keep interp__builtin_elementwise_int_binop
clean as we add more uses