Test data spilling and unspilling around RT shader calls

Test data spilling and unspilling around RT shader calls

The new test group contains tests that check different types of data can be
accessed before and after a shader call instruction. This includes:

* Integers and floats in different sizes and formats, and pointers to them.
* Structures and pointers to them.
* Images, samplers, sampled images and pointers to them.
* OpImageTexelPointers.
* Values containing OpNullConstant and OpUndef.
* Shader interfaces (ray payloads, callable data and hit attributes).
* Shader Record Buffer objects.

New tests:
dEQP-VK.ray_tracing_pipeline.data_spill.*

Components: Framework, Vulkan
VK-GL-CTS issue: 2388

Change-Id: Idfe48314154585a7ac1d3bb4a29c10075a826f5d