The cfi bot is throwing 3 different errors with ANGLE when using
the Vulkan backend:
- ChoosePhysicalDevice causes a "function with wrong dynamic type"
  error when using vkGetPhysicalDeviceProperties
- In volk.c, using vkGetInstanceProcAddr and vkGetDeviceProcAddr
  also causes a "function with wrong dynamic type" error
- In vk_mem_alloc.h, included from vk_mem_alloc_wrapper.cpp,
  GetAllocationCallbacks() causes a "unrelated cast" error

This cl silences all 3 cfi errors.

Bug: chromium:1116053
Change-Id: I864ec8d9e2acaec493f472e01b3987dcc641c58f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2363209Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Alexis Hétu <sugoi@chromium.org>