Move the overallocation test to test suites

This way the compiler does not complain about
an overly large allocation made.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>

tests/suites/test_suite_debug.function

@@ -195,3 +195,15 @@ exit:
     mbedtls_ssl_config_free(&conf);
 }
 /* END_CASE */
+
+/* BEGIN_CASE */
+void check_mbedtls_calloc_overallocation(int num, int size)
+{
+    unsigned char *buf;
+    buf = mbedtls_calloc((size_t) num, (size_t) size);
+    TEST_ASSERT(buf == NULL);
+
+exit:
+    mbedtls_free(buf);
+}
+/* END_CASE */