Extra tests for SPIR-V 1.4

Extra tests for SPIR-V 1.4

New tests
 * OpPtrEqual and OpPtrNotEqual comparisons against different buffers
 * NonWritable on a function variable in a non-entrypoint function
 * Select between arrays
 * Select between nested arrays and structs
 * Select between pointers
 * Selet between vectors with vector condition

Components: Vulkan

Affects:
dEQP-VK.spirv_assembly.instruction.spirv1p4.nonwritable.*
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrequal.*
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrnotequal.*
dEQP-VK.spirv_assembly.instruction.spirv1p4.opselect.*

VK-GL-CTS issue: 1855

Change-Id: Ie49d7a914cd7346d7da83d02f515a2772ae5bf94
(cherry picked from commit fbd39ed4f897735c22bb3472c18eed7756a476bb)