[3.3.5] ChatCommands, the other half: chat command resolution refactor (PR #25463)

(cherry picked from commit 1eca51b417)

src/server/scripts/Commands/cs_instance.cpp

@@ -39,6 +39,10 @@ EndScriptData */
 #include "WorldSession.h"
 #include <sstream>
 
+#if TRINITY_COMPILER == TRINITY_COMPILER_GNU
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 class instance_commandscript : public CommandScript
 {
 public: