[OpenMP] Fixed test environment of `check-libomptarget-nvptx`

D95161 removed the option `--libomptarget-nvptx-path`, which is used in
the tests for `libomptarget-nvptx`.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D95293

GitOrigin-RevId: cfd978d5d3c8a06813e25f69ff1386428380a7cb
1 file changed