Update Mesa CI CTS to latest version
The current CTS used in the CI is based on @anholt fork from Khronos official CTS, adding some fixes not released yet.
As the tag name indicates, vulkan-cts-1.2.4.1-mesa-ci-2020-11-06
it should be based on Vulkan CTS 1.2.4.1, but unfortunately it isn't (it seems to be based on a previous version).
Hence, it lacks several fixes that were released in 1.2.4.1, but that are not in the fork.
@anholt could it be possible to rebase the branch to Vulkan CTS 1.2.4.1, adding the missing commits on top?