core: add a destructor to CHyprOpenglImpl and avoid wl_container_of undefined behaviour (#7101)

* protocols: avoid undefined behaviour in C macro

to safely use wl_container_of with a class the class has to be no
virtual functions, no inheritance, and uniform access control (e.g all
public)

work around this by putting this into a destroywrapper struct.

* opengl: clean memory on destruction

add a destructor and free the allocated memory and close the fd

src/protocols/GlobalShortcuts.hpp

@@ -14,6 +14,12 @@ struct SShortcutClient {
     std::vector<std::unique_ptr<SShortcut>> shortcuts;
 };
 
+class CGlobalShortcutsProtocolManager;
+struct CGlobalShortcutsProtocolManagerDestroyWrapper {
+    wl_listener                      listener;
+    CGlobalShortcutsProtocolManager* parent = nullptr;
+};
+
 class CGlobalShortcutsProtocolManager {
   public:
     CGlobalShortcutsProtocolManager();
@@ -31,7 +37,7 @@ class CGlobalShortcutsProtocolManager {
 
     std::vector<SShortcut> getAllShortcuts();
 
-    wl_listener            m_liDisplayDestroy;
+    CGlobalShortcutsProtocolManagerDestroyWrapper m_liDisplayDestroy;
 
   private:
     std::vector<std::unique_ptr<SShortcutClient>> m_vClients;