freertos/make trace facility configurable

This commit makes configUSE_TRACE_FACILITY and
configUSE_STATS_FORMATTING_FUNCTIONS configurable in kconfig. Test cases fro the
functions enabled by the two configurations above have also been added.

Test cases for the following functions have been added...

- uxTaskGetSystemState()
- uxTaskGetTaskNumber()
- vTaskSetTaskNumber()

- xEventGroupClearBitsFromISR()
- xEventGroupSetBitsFromISR()
- uxEventGroupGetNumber()

- uxQueueGetQueueNumber()
- vQueueSetQueueNumber()
- ucQueueGetQueueType()

Test cases for the following functions were not required...

- prvListTaskWithinSingleList()
- prvWriteNameToBuffer()
- vTaskList()

components/freertos/tasks.c

@@ -2292,7 +2292,6 @@ UBaseType_t uxTaskGetNumberOfTasks( void )
 	{
 	UBaseType_t uxTask = 0, uxQueue = configMAX_PRIORITIES;
 
-		UNTESTED_FUNCTION();
 		taskENTER_CRITICAL(&xTaskQueueMutex);
 		{
 			/* Is there a space in the array for each task in the system? */
@@ -3678,7 +3677,6 @@ BaseType_t xTaskGetAffinity( TaskHandle_t xTask )
 	volatile TCB_t *pxNextTCB, *pxFirstTCB;
 	UBaseType_t uxTask = 0;
 
-		UNTESTED_FUNCTION();
 		if( listCURRENT_LIST_LENGTH( pxList ) > ( UBaseType_t ) 0 )
 		{
 			listGET_OWNER_OF_NEXT_ENTRY( pxFirstTCB, pxList );
@@ -4268,7 +4266,6 @@ For ESP32 FreeRTOS, vTaskExitCritical implements both portEXIT_CRITICAL and port
 	TaskStatus_t *pxTaskStatusArray;
 	volatile UBaseType_t uxArraySize, x;
 	char cStatus;
-		UNTESTED_FUNCTION();
 
 		/*
 		 * PLEASE NOTE: