This starts using MDT_RAW_DPI in the drivers, and provides the necessary raw/virt monitor information to wineserver. For now, this should not change much, as MDT_RAW_DPI is still the same as MDT_DEFAULT_DPI, but later it will return the DPI of the physical mode while MDT_DEFAULT_DPI will return a DPI for the possibly virtualized current display mode.
-- v2: server: Use the monitor infos to compute the virtual screen rect. win32u: Inform wineserver about the winstation monitors. win32u: Move some monitor info getter code around. win32u: Use MDT_RAW_DPI monitor DPI type in the drivers. win32u: Implement get_win_monitor_dpi.