test(libSceVideoOut): run the VideoOut flip tests with SDL's windows driver on Windows

ANYPS5_VIDEO_OUT_TEST_DRIVER defaulted to SDL's offscreen driver on every
host. That driver has no Vulkan on Windows, so all thirteen flip tests that
open a display skipped there. Windows now defaults to the windows driver.
A machine without a Vulkan driver makes DisplayWindow report that Vulkan
lacks VK_KHR_surface, so the flip tests also skip on a DisplayWindow error
that names Vulkan, as they do on offscreen's message.

core/libs/prx/libSceVideoOut/CMakeLists.txt

@@ -84,7 +84,12 @@ if(BUILD_TESTING)
         set_tests_properties(guest_video_out_cursor PROPERTIES ENVIRONMENT_MODIFICATION
             "PATH=path_list_prepend:$<TARGET_FILE_DIR:libc>")
     endif()
-    set(ANYPS5_VIDEO_OUT_TEST_DRIVER "offscreen" CACHE STRING
+    if(WIN32)
+        set(videoOutTestDriver "windows")
+    else()
+        set(videoOutTestDriver "offscreen")
+    endif()
+    set(ANYPS5_VIDEO_OUT_TEST_DRIVER "${videoOutTestDriver}" CACHE STRING
         "SDL video driver for VideoOut flip tests")
 
     foreach(flipMode IN ITEMS labels labels_main)

core/libs/prx/libSceVideoOut/tests/Flip.cpp

@@ -1054,7 +1054,9 @@ int main(int argc, char** argv) {
         std::fprintf(stderr, "%s\n", error.what());
         try { LibcRunShutdown_nid_postfix(); }
         catch (const std::exception& shutdown) { std::fprintf(stderr, "shutdown: %s\n", shutdown.what()); }
-        if (std::string(error.what()).find("Vulkan support") != std::string::npos && !std::getenv("ANYPS5_REQUIRE_DISPLAY")) {
+        const std::string what = error.what();
+        const bool noVulkanWindow = what.find("Vulkan support") != std::string::npos || (what.starts_with("DisplayWindow: ") && what.find("Vulkan") != std::string::npos);
+        if (noVulkanWindow && !std::getenv("ANYPS5_REQUIRE_DISPLAY")) {
             std::printf("skipped, no display or Vulkan device: %s\n", error.what());
             return 77;
         }