Suppress the VVL warning:
UNASSIGNED-BestPractices-vkCreateDevice-specialuse-extension

ANGLE uses the extension to match OpenGL ES line rasterization behavior,
so this warning doesn't apply and is being suppressed.

Bug: angleproject:5336
Change-Id: I2f0e086a7ff392e13b6a1da0a55b0e1b81953b2e
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2533437Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>