Ray tracing: avoid skipping triangles and AABBs at the same time

Ray tracing: avoid skipping triangles and AABBs at the same time

This is illegal according to the spec.

Removed tests:
dEQP-VK.ray_tracing_pipeline.builtin.incomingrayflagsext.*pipelineskipboth*
dEQP-VK.ray_tracing_pipeline.builtin.incomingrayflagsext.*rayskiptriangles.pipelineskipaabbs*
dEQP-VK.ray_tracing_pipeline.builtin.incomingrayflagsext.*rayskipaabbs.pipelineskiptriangles*
dEQP-VK.ray_tracing_pipeline.builtin.incomingrayflagsext.*rayskipboth*

Components: Vulkan
VK-GL-CTS issue: 3508

Change-Id: Iebc50b4b546abc36b2607eeb7c5cbb900de35fcb