CUDA: Update the inspection engine to inform the cuda module that it

doesn't need the gpu results and to release the packet for the next run.

Previously the inspection engine wouldn't inform the cuda module, if it
didn't need the results.  As a consequence, when the packet is next taken
for re-use, and if the packet is still being processed by the cuda module,
the engine would wait till the cuda module frees the packet.

This commits updates this functionality to inform the cuda module to
release the packet for the afore-mentioned case.
I would prefer it to happen as quickly as possible.  This would inform the cuda dispatcher to skip copying the results to the packet from the gpu run.