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

[Yitzhak Mandelbaum via cfe-commits]

ymand wrote:

What are the implications/requirements for users of DataflowAnalysis? Every instance specifices it's own lattice, which is converted to/from llvm::Any. Will every lattice definition require these new declarations?

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