Remove input blocks from SPIR-V 1.4 compute shaders

Remove input blocks from SPIR-V 1.4 compute shaders

Split input blocks in compute shaders into flat variables.

Component: Vulkan

VK-GL-CTS Issue: 1967

Affects:
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrequal.ssbo_comparisons_equal
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrequal.wg_comparisons_equal
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrnotequal.ssbo_comparisons_not_equal
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrnotequal.wg_comparisons_not_equal
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrdiff.ssbo_comparisons_diff
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrdiff.wg_comparisons_diff

Change-Id: I228583843148e36a33d7f469cb90f628eb432c37
(cherry picked from commit b976f5430158a62e03fe46500e25133e7a6113f2)