This avoids opening multiple Vulkan instances when multiple D3D kernel mode adapters are open.
Some tests that leak reference to D3D adapters crash because of out of memory errors before this
patch.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53201
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53231
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53235Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>