Hardcoded HAL port definitions

[RogerQi]

The hardware pin definitions are hardcoded in almost all main.cc files in examples, which prevents the designed convientent function of switching board by changing one line in CMakeLists.txt

For example, in the gimbal example,

https://github.com/illini-robomaster/iRM_Embedded_2022/blob/main/examples/gimbal/main.cc#L51

  gimbal = new control::Gimbal(gimbal_init_data);

  dbus = new remote::DBUS(&huart1);
}

Here, the huart1 is the dbus port for the type A board only. For type-c board, the dbus port is

https://github.com/illini-robomaster/iRM_Embedded_2022/blob/main/examples/chassis/main.cc#L56

  chassis = new control::Chassis(chassis_data);

  dbus = new remote::DBUS(&huart3);
}

This should not be manually defined in every main.cc file. Instead, this port definition should be a DEFINE for one-liner change to switch to a differenty type of STM32 control board.