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

[Saleem Abdulrasool via llvm-commits]

compnerd wrote:

I don't think that this is tractable this way. We need to scope the changes to a library at a time rather than an API at a time. There is going to be a large number of decorations that are needed as we start to get further.

Can you collapse all the Support changes into a single PR and the set of changes for ADT into a single PR?

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