Add sample mask test for FSR

Add sample mask test for FSR

This change adds single test that uses pipelineFragmentShadingRate
with fragmentSize {2,2}, 4xMSAA and a sample mask of 0x9.
After drawing random triangles there is a check that samples are
written only to samples present in the sample mask.

VK-GL-CTS issue: 2397

Components: Vulkan

Affects:
dEQP-VK.fragment_shading_rate.misc_tests.*

Change-Id: I38bbddeb2f8d7e8aac1c3803b171ec5be2f0c21a