[video_core, hle] remove redundant parent references in system structs (#3908)

reworked a bit to remove references of parent objects and instead pass as arguments to methods to prevent useless reloads

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Co-authored-by: maufeat <sahyno1996@gmail.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3908
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: crueter <crueter@eden-emu.dev>

src/video_core/control/scheduler.h

@@ -22,17 +22,13 @@ struct ChannelState;
 
 class Scheduler {
 public:
-    explicit Scheduler(GPU& gpu_);
-    ~Scheduler();
-
-    void Push(s32 channel, CommandList&& entries);
+    void Push(GPU& gpu, s32 channel, CommandList&& entries);
 
     void DeclareChannel(std::shared_ptr<ChannelState> new_channel);
 
 private:
     ankerl::unordered_dense::map<s32, std::shared_ptr<ChannelState>> channels;
     std::mutex scheduling_guard;
-    GPU& gpu;
 };
 
 } // namespace Control