CI: increase IPC stack size for test_utils configs

tools/unit-test-app/configs/test_utils

@@ -1,4 +1,4 @@
 # This config is for all targets
 # The test is isolated as it requires particular memory layout
 TEST_COMPONENTS=test_utils
-CONFIG_ESP_IPC_TASK_STACK_SIZE=2048
+CONFIG_ESP_IPC_TASK_STACK_SIZE=3072

tools/unit-test-app/configs/test_utils_psram

@@ -2,5 +2,5 @@
 CONFIG_IDF_TARGET="esp32"
 # The test is isolated as it requires particular memory layout
 TEST_COMPONENTS=test_utils
-CONFIG_ESP_IPC_TASK_STACK_SIZE=2048
+CONFIG_ESP_IPC_TASK_STACK_SIZE=3072
 CONFIG_ESP32_SPIRAM_SUPPORT=y