Switch selected channels to use sets

components/codecs/include/ftl/codecs/channels.hpp

components/rgbd-sources/CMakeLists.txt

components/streams/include/ftl/streams/netstream.hpp

components/streams/include/ftl/streams/stream.hpp

components/streams/src/builder.cpp

components/streams/src/receiver.cpp

components/streams/src/stream.cpp

components/streams/test/receiver_unit.cpp

components/streams/test/sender_unit.cpp

components/structures/include/ftl/data/new_frame.hpp

components/structures/src/new_frame.cpp