Disable VulkanHppModule support in clang-cl

The current released versions of clang-cl does not work with CMakes
module implementation. Rather than break downstream users, just disable
the module support for the time being.

CMakeLists.txt

@@ -43,8 +43,9 @@ add_library(Vulkan::Headers ALIAS Vulkan-Headers)
 target_include_directories(Vulkan-Headers INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>)
 
 if (MSVC AND (MSVC_VERSION GREATER_EQUAL "1941") OR
-    CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "16.0" OR
-    CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "14.0")
+    # clang-cl doesn't currently support modules
+    (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "16.0" AND (NOT CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES "MSVC")) OR
+    (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "14.0"))
     set(COMPILER_SUPPORTS_CXX_MODULES TRUE)
 endif()