[*] change all std::unordered_map and std::unordered_set into ankerl::unordered_dense::map/set variants (#3442)

mainly doing this to reduce memory footprint; we all know how nice ankerl::unordered_dense is

in theory 4x faster - in practice these maps arent that "hot" anyways so not likely to have much perf gained

i just want to reduce mem fragmentation to ease my porting process, plus it helps other platforms as well (ahem weak Mediatek devices) :)

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Co-authored-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3442
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/input_common/drivers/sdl_driver.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2018 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -6,7 +9,7 @@
 #include <atomic>
 #include <mutex>
 #include <thread>
-#include <unordered_map>
+#include <ankerl/unordered_dense.h>
 
 #include <SDL.h>
 
@@ -116,7 +119,7 @@ private:
     Common::SPSCQueue<VibrationRequest> vibration_queue;
 
     /// Map of GUID of a list of corresponding virtual Joysticks
-    std::unordered_map<Common::UUID, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
+    ankerl::unordered_dense::map<Common::UUID, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
     std::mutex joystick_map_mutex;
 
     bool start_thread = false;