[flang][rt] Add noinline attributes for CUDA compile path for successful compilation (#161760)

NVCC does more aggressive inlining than Clang/GCC causing the exported
functions in extrema.cpp and findloc.cpp to become extremely large from
function specializations leading to compilation timeouts. Marking the 2
functions in this change as noinline for NVCC alleviates this problem as
it removes the worst of the cross-matrix argument specializations.

Also remove the workaround in
https://github.com/llvm/llvm-project/pull/156542 that opted out
findloc.cpp from the CUDA flang-rt build

Testing:
ninja flang-rt builds in ~30 minutes, these 2 files build in ~3 minutes

0 files changed, 0 insertions, 0 deletions