Do not test CLEAR loadOp with read-only depth stencil image layouts

Do not test CLEAR loadOp with read-only depth stencil image layouts

It is invalid to use implicit clears with depth stencil images, which first
render pass usage is in read only depth/stencil image layout

Spec:
"
For any member of pAttachments with a loadOp equal to VK_ATTACHMENT_LOAD_OP_CLEAR,
the first use of that attachment must not specify a layout equal to
VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL.

For any member of pAttachments with a stencilLoadOp equal to VK_ATTACHMENT_LOAD_OP_CLEAR,
the first use of that attachment must not specify a layout equal to
VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL."

Component: Vulkan

Affects:
dEQP-VK.renderpass.suballocation.formats.d*.clear.*_read_only

VK-GL-CTS Issue: 1144

Change-Id: Iad78473fe4bdf87dac5aff5bcc1c2b888e790cb8