[wpilib] Deprecate Accelerometer and Gyro interfaces (#5445)

Accelerometer is hyper-specific to ADXL accelerometers, and Gyro is
less useful now that 3D IMUs are prevalent, and if those IMUs want to
support the Gyro interface, they also need to provide a way to set the
axis used for the Gyro interface, which is confusing. Higher-order
functions (e.g., lambdas) are a more flexible interface boundary than
interfaces, but they didn't exist when these interfaces were
created.

wpilibc/src/main/native/cpp/ADXRS450_Gyro.cpp

@@ -140,6 +140,10 @@ void ADXRS450_Gyro::Calibrate() {
   m_spi.ResetAccumulator();
 }
 
+Rotation2d ADXRS450_Gyro::GetRotation2d() const {
+  return units::degree_t{-GetAngle()};
+}
+
 int ADXRS450_Gyro::GetPort() const {
   return m_port;
 }