vulkan: Rename bool32_t to VkBool32

Target was v129 of the header
diff --git a/tests/test_environment.cpp b/tests/test_environment.cpp
index ff0d33c..78bb249 100644
--- a/tests/test_environment.cpp
+++ b/tests/test_environment.cpp
@@ -69,7 +69,7 @@
 
     instance_extension_names.push_back(VK_WSI_LUNARG_EXTENSION_NAME);
 
-    bool32_t extFound;
+    VkBool32 extFound;
 
     instance_extensions = vk_testing::GetGlobalExtensions();