[vk] Implement Shader Read Barrier

revert [video_core] Fix stutters and freezes when playing FMV content in some games (#2650)

This fixes stutters and freezes when playing FMV content in some games.

Reviewed-on: #2650
Co-authored-by: MaranBr <maranbr@outlook.com>
Co-committed-by: MaranBr <maranbr@outlook.com>

src/common/settings.h

@@ -320,19 +320,11 @@ struct Values {
                                                                 linkage, true, "cpuopt_unsafe_ignore_global_monitor", Category::CpuUnsafe};
 
     // Renderer
-    SwitchableSetting<RendererBackend, true> renderer_backend{linkage,
-#if defined(__sun__) || defined(__managarm__)
-                                                              RendererBackend::OpenGL,
-#else
-                                                              RendererBackend::Vulkan,
-#endif
+    SwitchableSetting<RendererBackend, true> renderer_backend{
+                                                              linkage, RendererBackend::Vulkan,
                                                               "backend", Category::Renderer};
-    SwitchableSetting<ShaderBackend, true> shader_backend{linkage,
-#if defined(__sun__) || defined(__managarm__)
-                                                          ShaderBackend::Glsl,
-#else
-                                                          ShaderBackend::SpirV,
-#endif
+    SwitchableSetting<ShaderBackend, true> shader_backend{
+                                                          linkage, ShaderBackend::SpirV,
                                                           "shader_backend", Category::Renderer,  Specialization::RuntimeList};
     SwitchableSetting<int> vulkan_device{linkage, 0, "vulkan_device", Category::Renderer,
                                          Specialization::RuntimeList};