Test enum with settings for separate controls

Test enum with settings for separate controls

The original VK_KHR_shader_controls shipped with booleans named
"separateDenormSettings" and "separateRoundingModeSettings". In
recent specification update those boolean values were changed into
a tri-state enum. This change adjusts tests to that.

Components: Vulkan

VK-GL-CTS issue: 1791

Affects:
dEQP-VK.spirv_assembly.instruction.compute.float_controls.*
dEQP-VK.spirv_assembly.instruction.graphics.float_controls.*
dEQP-VK.spirv_assembly.instruction.compute.float_controls.independence_settings.*
dEQP-VK.spirv_assembly.instruction.compute.float16.logical_nan.*
dEQP-VK.spirv_assembly.instruction.compute.float_controls.fp*
dEQP-VK.spirv_assembly.instruction.graphics.float16.logical_nan.*
dEQP-VK.spirv_assembly.instruction.graphics.float_controls.fp*

Change-Id: Ibabef071e32c75468176d505624c1cb140c26a47