Extended test infrastructure to call per plugin configure function before running a test. The function allows to pass plugin specific configuration (#2731)

docs/template_plugin/tests/functional/plugin_config.cpp

@@ -0,0 +1,8 @@
+// Copyright (C) 2020 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#include "functional_test_utils/plugin_config.hpp"
+
+void PreparePluginConfiguration(LayerTestsUtils::LayerTestsCommon* test) {
+}