Add render pass multisample resolve tests
- Check that attachment components are resolved consistently
- Check that attachments are resolved consistently
- Check that integer formats always resolve to one of the samples
- Check that empty sample mask doesn't change values
- Check that all possible sample combinations of 1.0 and 0.0 values
resolve to 0.5 on average.
VK-GL-CTS issues: 96
Components: Vulkan
Change-Id: I18b92ed713175cd935651575f4e48d9fd207ef00
(cherry picked from commit
c8c44388f472dcbb6145b520c4a89e5ef02221b3)