[Bug 57478] Sims 2 black-screen when running with Nvidia 470.256.02 and dxvk 1.10.3

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57478

--- Comment #10 from Daniel Kamil Kozar  ---
Since the issue seems to be isolated to a select few cases, most likely related
to specific driver/application/fullscreen conditions, how about making the
behaviour selectable at runtime? This way, existing applications and users are
not affected while those running into this issue can set an envvar and see if
it helps.

The patch here adds a WINEX11_NO_VULKAN_SURFACE_UPDATE environment variable
that, when set, will make X11DRV_vulkan_surface_update() do absolutely nothing.
This makes Sims 2 work as before.