Merge branch 'jekstrand-clearing-fixes' into 'vulkan-cts-1.0-dev'

image_clearing: Don't set a component mapping for the view to be cleared

From the Vulkan 1.0.12 spec for VkComponentMapping:

> This remapping must be identity for storage image descriptors, input
> attachment descriptors, and framebuffer attachments.

This fixes 6 CTS tests on the Intel Linux driver.

See merge request !568