SPIR-V tests for VK_KHR_shader_float16_int8

SPIR-V tests for VK_KHR_shader_float16_int8

Add tests:
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.function*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical.*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.opconstant.*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.derivative*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.opvectorextractdynamic*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.opvectorinsertdynamic*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.opvectorshuffle*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.opcompositeconstruct*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.opcompositeextract*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.opcompositeinsert*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.arithmetic*
 * dEQP-VK.spirv_assembly.instruction.graphics.opspecconstantop.fconvert16_*
 * dEQP-VK.spirv_assembly.instruction.graphics.opphi.swap16_*
 * dEQP-VK.spirv_assembly.instruction.graphics.fconvert.*float16*
 * dEQP-VK.spirv_assembly.instruction.graphics.convert*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.function*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical.*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.opconstantcomposite.*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.opvectorextractdynamic*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.opvectorinsertdynamic*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.opvectorshuffle*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.opcompositeconstruct*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.opcompositeextract*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.opcompositeinsert*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.arithmetic*
 * dEQP-VK.spirv_assembly.instruction.compute.opspecconstantop.fconvert16
 * dEQP-VK.spirv_assembly.instruction.compute.opphi.vartype_float16
 * dEQP-VK.spirv_assembly.instruction.compute.fconvert.*float16*
 * dEQP-VK.spirv_assembly.instruction.compute.convert*

Affects tests:
 * dEQP-VK.spirv_assembly.instruction.*

Components: Vulkan

VK-GL-CTS issue: 1095

Change-Id: If6112d42a9b84eaff50e559f0a4b438372815ae7
(cherry picked from commit 449a2e07496fc77e1c267b00d3d9e4c070accbb9)