OpPtrEqual OpPtrNotEqual for non-variable pointers

OpPtrEqual OpPtrNotEqual for non-variable pointers

Test checking the possibility of using OpPtrEqual and
OpPtrNotEqual without full variable pointer support
on simple data primitives like matrices and regular floats

Components: Vulkan

VK-GL-CTS issue: 2905

New tests:
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrequal.simple_variable_pointers_ptr_equal
dEQP-VK.spirv_assembly.instruction.spirv1p4.opptrnotequal.simple_variable_pointers_ptr_not_equal

Change-Id: I77d13e4ba22c4a9bd27c055233c6a1ae0e077f09