[Codebase] reverted BoardScheduler from module to singleton

src/boards/Parafoil/Actuators/Actuators.cpp

src/boards/Parafoil/AltitudeTrigger/AltitudeTrigger.cpp

src/boards/Parafoil/BoardScheduler.h

src/boards/Parafoil/ModuleHelper/ModuleHelper.hpp

src/boards/Parafoil/Radio/Radio.cpp

...ds/Parafoil/StateMachines/NASController/NASController.cpp

.../Parafoil/StateMachines/WingController/WingController.cpp

src/boards/Parafoil/TMRepository/TMRepository.cpp

src/boards/Parafoil/Wing/WingAlgorithm.cpp

src/entrypoints/Parafoil/parafoil-entry-sequence.cpp

src/entrypoints/Parafoil/parafoil-entry.cpp

src/tests/Parafoil/parafoil-test-WES.cpp

src/tests/Parafoil/parafoil-test-WingController.cpp