Add inrange to getelementptr for vtable

[smeenai]

I'm tracking https://github.com/llvm/clangir/pull/569#discussion_r1609000335 here so we don't forget it. https://godbolt.org/z/9b4o1GKrK shows that OG CodeGen adds inrange to the getelementptr for the vtable address point, but CIRGen doesn't, so we should match OG at some point.