tests: bluetooth: tester: Increase stack size for nrf54l15

Due to MBEDTLS nrf54l15 requires more stack sizes.

Signed-off-by: alperen sener <[email protected]>

Author: m-alperen-sener

tests/bluetooth/tester/boards/nrf54l15dk_nrf54l15_cpuapp.conf

@@ -1 +1,3 @@
 CONFIG_ZMS=y
+CONFIG_BT_RX_STACK_SIZE=4096
+CONFIG_BT_MESH_ADV_STACK_SIZE=2048

tests/bluetooth/tester/src/bttester.c

@@ -22,7 +22,7 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME);
 
 #include "bttester.h"
 
-#define STACKSIZE 3072
+#define STACKSIZE 4096
 static K_THREAD_STACK_DEFINE(stack, STACKSIZE);
 static struct k_thread cmd_thread;