RP2040: FreeRTOS-Kernel-Static use configKERNEL_PROVIDED_STATIC_MEMORY (#934)

Remove the idle_task_static_memory.c and use the new default implementations
to allows for FreeRTOS-Kernel-Static to be used with configNUMBER_OF_CORES > 1

Author: dpslwk

portable/ThirdParty/GCC/RP2040/idle_task_static_memory.c

@@ -46,9 +46,9 @@ target_compile_definitions(FreeRTOS-Kernel INTERFACE
 add_library(FreeRTOS-Kernel-Static INTERFACE)
 target_compile_definitions(FreeRTOS-Kernel-Static INTERFACE
         configSUPPORT_STATIC_ALLOCATION=1
+        configKERNEL_PROVIDED_STATIC_MEMORY=1
         )
 
-target_sources(FreeRTOS-Kernel-Static INTERFACE ${CMAKE_CURRENT_LIST_DIR}/idle_task_static_memory.c)
 target_link_libraries(FreeRTOS-Kernel-Static INTERFACE FreeRTOS-Kernel)
 
 add_library(FreeRTOS-Kernel-Heap1 INTERFACE)