Resolve "Thoroughly test zero-copy transport"

• Adapts to Dashing changes and corresponding V4L2 camera changes to be able to use intra-process communication; mostly setting use_intra_process_comms on the camera node and subscribing using unique_ptr.
• Add nodes for all combinations of standalone/composed, single/multi node and intra-process comms enabled/disabled
• Add run script to do timing runs and collect the data

Closes #2 (closed)