[nrf fromtree] tests: bluetooth: tester: Make BTP CMD thread stack size kconfig

Different test layers need different stack sizes for BTP CMD thread
and also AutoPTS might need to overwrite this config based on test
case.

Increase the stack size for mesh tests.

Signed-off-by: alperen sener <[email protected]>
(cherry picked from commit 3cab4fe)

Author: m-alperen-sener

tests/bluetooth/tester/Kconfig

@@ -9,6 +9,12 @@ module = BTTESTER
 module-str = bttester
 source "subsys/logging/Kconfig.template.log_config"
 
+config BTTESTER_BTP_CMD_THREAD_STACK_SIZE
+	int "BTP CMD threads stack size."
+	default 2048
+	help
+	  Stack size in byte used by the BTP CMD thread.
+
 endmenu
 
 source "Kconfig.zephyr"

tests/bluetooth/tester/overlay-mesh.conf

@@ -2,6 +2,7 @@
 # PSA key slots; in order to make sure there is always
 # enough key slots allocating 32 slots.
 CONFIG_MBEDTLS_PSA_KEY_SLOT_COUNT=32
+CONFIG_BTTESTER_BTP_CMD_THREAD_STACK_SIZE=3072
 
 CONFIG_BT_MESH=y
 CONFIG_BT_MESH_RELAY=y

tests/bluetooth/tester/src/btp.c

@@ -24,7 +24,7 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME, CONFIG_BTTESTER_LOG_LEVEL);
 
 #include "btp/btp.h"
 
-#define STACKSIZE 2048
+#define STACKSIZE CONFIG_BTTESTER_BTP_CMD_THREAD_STACK_SIZE
 static K_THREAD_STACK_DEFINE(stack, STACKSIZE);
 static struct k_thread cmd_thread;