tests: Mark a number of d3d12 tests as broken on WARP.

This is in view of eventually running the vkd3d cross tests in the CI. See this branch with all the other commits to run the tests on Windows cleanly.

I haven't investigated in detail all these issues. Also, it is known that WARP doesn't emulate faithfully a hardware device. The idea is that having the CI able to quickly check most (even if not all) our tests on native is still better than nothing.