Merged plugin and exec network internal implementation (#4923)

Co-authored-by: Ilya Lavrenov <ilya.lavrenov@intel.com>

docs/template_plugin/src/template_executable_network.cpp

@@ -8,6 +8,7 @@
 #include <ie_plugin_config.hpp>
 #include <threading/ie_executor_manager.hpp>
 
+#include "ie_icore.hpp"
 #include "template/template_config.hpp"
 #include "template_itt.hpp"
 #include "template_plugin.hpp"