[sim] Update sim match time to match real robot (#4024)

The real robot has match time set to -1.0 until it's enabled, and then
counts down. Disabling the robot sets the time to -1.0.

The sim GUI has been updated to add preset buttons for auto and teleop
match times. The enable match timing checkbox has been removed as it's
no longer required.

The DS socket plugin has also been fixed to properly initialize
matchTime to -1.0 and reset it to -1.0 on disable.

simulation/halsim_ds_socket/src/main/native/cpp/DSCommPacket.cpp

@@ -310,6 +310,10 @@ void DSCommPacket::SetupJoystickTag(wpi::raw_uv_ostream& buf) {
 void DSCommPacket::SendUDPToHALSim(void) {
   SendJoysticks();
 
+  if (!m_control_word.enabled) {
+    m_match_time = -1;
+  }
+
   HALSIM_SetDriverStationMatchTime(m_match_time);
   HALSIM_SetDriverStationEnabled(m_control_word.enabled);
   HALSIM_SetDriverStationAutonomous(m_control_word.autonomous);