Use OpenGL for overlay

applications/gui/src/camera.cpp

applications/gui/src/camera.hpp

applications/gui/src/gltexture.cpp

applications/gui/src/gltexture.hpp

applications/gui/src/screen.cpp

applications/gui/src/screen.hpp

components/renderers/cpp/CMakeLists.txt

components/renderers/cpp/include/ftl/render/overlay.hpp

components/renderers/cpp/src/CUDARender.cpp

components/renderers/cpp/src/overlay.cpp

components/rgbd-sources/src/source.cpp