Fix SMP debugging issue on rp2040 (FreeRTOS#1174)

* Fix SMP debugging issue on rp2040

Related to FreeRTOS#1172

Add `multicore_reset_core1` before `multicore_launch_core1` in `xPortStartScheduler` function to fix debugging issue on rp2040 with SMP enabled.

* Modify `portable/ThirdParty/GCC/RP2040/port.c` to include a call to `multicore_reset_core1` before `multicore_launch_core1` within the `#if portRUNNING_ON_BOTH_CORES` block.

* Recover comments back

---------

Co-authored-by: ActoryOu <[email protected]>
Co-authored-by: Gaurav-Aggarwal-AWS <[email protected]>
Co-authored-by: Rahul Kar <[email protected]>

Author: 4 people

portable/ThirdParty/GCC/RP2040/port.c

@@ -378,6 +378,7 @@ void vPortStartFirstTask( void )
         #if portRUNNING_ON_BOTH_CORES
             ucPrimaryCoreNum = configTICK_CORE;
             configASSERT( get_core_num() == 0 ); /* we must be started on core 0 */
+            multicore_reset_core1();
             multicore_launch_core1( prvDisableInterruptsAndPortStartSchedulerOnCore );
         #else
             ucPrimaryCoreNum = get_core_num();