Vulkan: Expose EXT_instanced_arrays
Vulkan: Expose EXT_instanced_arrays

Implemented in

    https://chromium-review.googlesource.com/c/angle/angle/+/1452740

was missing exposure from the Vulkan backend.

Bug: angleproject:3105
Change-Id: If82e6f3dfa5ff8fafbc401258a5e324ea311123d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1773906
Reviewed-by: Jonah Ryan-Davis <682bdb9e7d8ba359ef169b8db374e7a99d394a46@google.com>
Commit-Queue: Shahbaz Youssefi <582eeec4f08a2ccd61e3ef52115e6e7c571582de@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle