[clang] [llvm] [llvm] Support llvm::Any across shared libraries on windows (PR #108051)

[Yitzhak Mandelbaum via cfe-commits]

ymand wrote:

> @ymand, is your concern resolved?

Sorry, it isn't -- a) we still need comments with at least minimal explanation and b) I'm not sure why the definition is now in TypeErasedDataflowAnalysis.cpp -- is this because we lack NoopAnalysis.cpp? If so, why is TypeErasedDataflowAnalysis.cpp then the right place? or, should we create a NoopAnalysis.cpp?

https://github.com/llvm/llvm-project/pull/108051