Convert GraphicsFuzz vkscript to AmberScript

Convert GraphicsFuzz vkscript to AmberScript

Also re-disassembled some SPIR-V shaders so that IDs are numbers instead
of names. Corrected some comments. Changed some tests to check ALL
pixels colors where this was possible.

Components: Vulkan

Affected tests:

dEQP-VK.graphicsfuzz.*

Change-Id: Iea2e7d852cf2b02886af84e986d180614ae543ff