[llvm] [DebugInfo][RemoveDIs] Handle DPValues at remaining dbg.value using sites (PR #73788)

[Orlando Cazalet-Hyams via llvm-commits]

https://github.com/OCHyams commented:

>  I've left FIXME stubs indicating that we intend to cover tests with RemoveDIs but haven't yet 

I can't see these - are they missing from the patch?

https://github.com/llvm/llvm-project/pull/73788