[lldb][windows] use Windows APIs to print to the console (#149493)
This patch uses the Windows APIs to print to the Windows Console,
through `llvm::raw_fd_ostream`.
This fixes a rendering issue where the characters defined in
`DiagnosticsRendering.cpp` (`"╰"` for instance) are not rendered
properly on Windows out of the box, because the default codepage is not
`utf-8`.
This solution is based on [this patch
downstream](https://github.com/swiftlang/swift/pull/40632/files#diff-e948e4bd7a601e3ca82d596058ccb39326459a4751470eec4d393adeaf516977R37-R38).
rdar://156064500