FidelityFX FSR implementation (#2624)

* host_shaders: support for includes

* video_core: add a simpler vulkan asserts

* video_core: refactored post processing pipeline to another file

* renderer_vulkan: add define param to compile shader utility

* video_core: fsr implementation

* devtools: show resolution & fsr state

src/core/debug_state.h

@@ -158,6 +158,10 @@ public:
     float Framerate = 1.0f / 60.0f;
     float FrameDeltaTime;
 
+    std::pair<u32, u32> game_resolution{};
+    std::pair<u32, u32> output_resolution{};
+    bool is_using_fsr{};
+
     void ShowDebugMessage(std::string message) {
         if (message.empty()) {
             return;