[llvm] [RemoveDIs][DebugInfo] Add DPValue checks to the verifier, prepare DPValue for parsing support (PR #79810)

[Stephen Tozer via llvm-commits]

SLTozer wrote:

> IMO trying to form the intrinsic-name at runtime is too much effort if it's about to be printed out.

SGTM!

https://github.com/llvm/llvm-project/pull/79810