Re-add texture filtering tests with rgba10x6 format

Re-add texture filtering tests with rgba10x6 format

These tests were removed when only the check for
formatRgba10x6WithoutYCbCrSampler feature was missing

Components: Vulkan

VK-GL-CTS issue: 3646

New tests:
dEQP-VK.texture.filtering.3d.formats.r10x6g10x6b10x6a10x6_unorm.r10x6g10x6b10x6a10x6_unorm_nearest
dEQP-VK.texture.filtering.3d.formats.r10x6g10x6b10x6a10x6_unorm.r10x6g10x6b10x6a10x6_unorm_linear
dEQP-VK.texture.filtering.3d.formats.r10x6g10x6b10x6a10x6_unorm.r10x6g10x6b10x6a10x6_unorm_nearest_mipmap_nearest
dEQP-VK.texture.filtering.3d.formats.r10x6g10x6b10x6a10x6_unorm.r10x6g10x6b10x6a10x6_unorm_linear_mipmap_nearest
dEQP-VK.texture.filtering.3d.formats.r10x6g10x6b10x6a10x6_unorm.r10x6g10x6b10x6a10x6_unorm_nearest_mipmap_linear
dEQP-VK.texture.filtering.3d.formats.r10x6g10x6b10x6a10x6_unorm.r10x6g10x6b10x6a10x6_unorm_linear_mipmap_linear

Change-Id: Ida3cb9f1abd95f57908b9540c65605cbb1b40fa3