Remove NaN handling in float16 tests

Remove NaN handling in float16 tests

Support of NaNs is optional according the specification.
Tests always have expected that NaNs are always supported.
To be compatible with the specification skip check of NaN
input floats.

Updated tests:
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical.opfunord*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical.opfunord*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical.opford*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical.opford*

Affected tests:
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical.opisnan*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical.opisnan*
 * dEQP-VK.spirv_assembly.instruction.compute.float16.logical.opisinf*
 * dEQP-VK.spirv_assembly.instruction.graphics.float16.logical.opisinf*

Components: Vulkan

VK-GL-CTS issue: 1528

Change-Id: Iadd91ed24c78e15ff458355262b009015b8a8e4a