Video: Clearly separate Texture and EFB Copy formats

Improve bookkeeping around formats. Hopefully make code less confusing.

- Rename TlutFormat -> TLUTFormat to follow conventions.
- Use enum classes to prevent using a Texture format where an EFB Copy format
  is expected or vice-versa.
- Use common EFBCopyFormat names regardless of depth and YUV configurations.

Source/Core/VideoBackends/Software/SWmain.cpp

@@ -50,13 +50,13 @@ class TextureCache : public TextureCacheBase
 public:
   bool CompileShaders() override { return true; }
   void DeleteShaders() override {}
-  void ConvertTexture(TCacheEntry* entry, TCacheEntry* unconverted, void* palette,
-                      TlutFormat format) override
+  void ConvertTexture(TCacheEntry* entry, TCacheEntry* unconverted, const void* palette,
+                      TLUTFormat format) override
   {
   }
-  void CopyEFB(u8* dst, const EFBCopyFormat& format, u32 native_width, u32 bytes_per_row,
-               u32 num_blocks_y, u32 memory_stride, bool is_depth_copy,
-               const EFBRectangle& src_rect, bool scale_by_half) override
+  void CopyEFB(u8* dst, const EFBCopyParams& params, u32 native_width, u32 bytes_per_row,
+               u32 num_blocks_y, u32 memory_stride, const EFBRectangle& src_rect,
+               bool scale_by_half) override
   {
     EfbCopy::CopyEfb();
   }