[llvm] [llvm] DLLExport public methods from SmallVector (PR #127850)

[Jakub Kuderski via llvm-commits]

https://github.com/kuhar requested changes to this pull request.

This line of work requires an RFC on discourse IMO. I'd like to understand why we are introducing these changes to ADT and why this wasn't needed before. We should make sure that we are not advertising unstable APIs to the unintended users.

https://github.com/llvm/llvm-project/pull/127850