[llvm] [llvm] replace static_assert with std::enable_if_t in ilist_node_impl (PR #127722)

[Jakub Kuderski via llvm-commits]

kuhar wrote:

I think we should wait on this https://github.com/llvm/llvm-project/pull/127850#issuecomment-2675535706 given that the code works fine in all the configurations supported at the moment.

https://github.com/llvm/llvm-project/pull/127722