main: Update Shader Cache menu options

This change adds two new context menu items to remove either the OpenGL or the Vulkan shader caches individually, and the provides the option to remove all caches for the selected title.
This also changes the behavior of the open shader cache option. Now it creates the shader cache directory for the title if it does not yet exist.

src/yuzu/game_list.h

@@ -41,7 +41,9 @@ enum class GameListOpenTarget {
 };
 
 enum class GameListRemoveTarget {
-    ShaderCache,
+    GlShaderCache,
+    VkShaderCache,
+    AllShaderCache,
     CustomConfiguration,
 };