chore: import upstream snapshot with attribution

tools/test_apps/system/init_array/main/CMakeLists.txt

@@ -0,0 +1,2 @@
+idf_component_register(SRCS "test_app_main.c"
+                       REQUIRES esp_system)

tools/test_apps/system/init_array/main/test_app_main.c

@@ -0,0 +1,50 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Unlicense OR CC0-1.0
+ */
+#include <stdio.h>
+#include <stdint.h>
+
+__attribute__((constructor))
+void foo(void)
+{
+    printf("%s\n", __FUNCTION__);
+}
+
+__attribute__((constructor(103)))
+void init_prio_103(void)
+{
+    printf("%s\n", __FUNCTION__);
+}
+
+__attribute__((constructor(101)))
+void init_prio_101(void)
+{
+    printf("%s\n", __FUNCTION__);
+}
+
+__attribute__((constructor(102)))
+void init_prio_102(void)
+{
+    printf("%s\n", __FUNCTION__);
+}
+
+__attribute__((constructor))
+void bar(void)
+{
+    printf("%s\n", __FUNCTION__);
+}
+
+void preinit_func(void)
+{
+    printf("%s\n", __FUNCTION__);
+}
+
+__attribute__((section(".preinit_array"), used))
+uintptr_t test_preinit = (uintptr_t) preinit_func;
+
+void app_main(void)
+{
+    printf("app_main running\n");
+}