[clang] [CUDA] Fix a couple of driver tests that really weren't being run (PR #93960)

[Paul T Robinson via cfe-commits]

pogo59 wrote:

I found these because while I normally build with all targets, I don't usually bother running check-all. The other day I did, and these two tests failed. Driver tests normally should not need *-registered-target constraints, and these tests were looking at the host's CUDA installation for the version checks. The tests need to be better isolated than that.

https://github.com/llvm/llvm-project/pull/93960