[llvm] Support: unlock Windows API support, switch to Windows 10 RS1+ APIs (PR #102240)

[Saleem Abdulrasool via llvm-commits]

compnerd wrote:

True that the fallback world continue to behave as it does today. The reason for this change is that it does break and the failure is very difficult to track down. The swift toolchain has been shipping this change for quite a while (3 years or so) and never actually had any complaint about compatibility. The idea of retrying on ERROR_INVALID_PARAMETER is really good though.

https://github.com/llvm/llvm-project/pull/102240