giga: relocate llext heap and main stack

Author: pennam

variants/arduino_giga_r1_stm32h747xx_m7/arduino_giga_r1_stm32h747xx_m7.conf

@@ -11,10 +11,14 @@ CONFIG_CDC_ACM_DTE_RATE_CALLBACK_SUPPORT=y
 
 CONFIG_LLEXT_STORAGE_WRITABLE=n
 CONFIG_SHARED_MULTI_HEAP=y
-CONFIG_HEAP_MEM_POOL_SIZE=24576
-CONFIG_SHELL_STACK_SIZE=32768
+CONFIG_HEAP_MEM_POOL_SIZE=32768
 CONFIG_MAIN_STACK_SIZE=32768
 CONFIG_LLEXT_HEAP_SIZE=128
+CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=-1
+
+CONFIG_CODE_DATA_RELOCATION=y
+CONFIG_MAIN_STACK_REGION="DTCM"
+CONFIG_LLEXT_HEAP_REGION="SRAM2"
 
 CONFIG_CPP=n
 CONFIG_SHELL=n