This commit removes the usage of all legacy FreeRTOS data types that are exposed via configENABLE_BACKWARD_COMPATIBILITY. Legacy types can still be used by enabling CONFIG_FREERTOS_ENABLE_BACKWARD_COMPATIBILITY.
Added host-based I2C C++ unit tests BREAKING CHANGE: I2C C++ interface changes, raw values for arguments are mostly not allowed anymore.
BREAKING CHANGE: removed ringbuf.h from public i2c.h