Convert BPMemory to BitField and enum class

Additional changes:
- For TevStageCombiner's ColorCombiner and AlphaCombiner, op/comparison and scale/compare_mode have been split as there are different meanings and enums if bias is set to compare.  (Shift has also been renamed to scale)
- In TexMode0, min_filter has been split into min_mip and min_filter.
- In TexImage1, image_type is now cache_manually_managed.
- The unused bit in GenMode is now exposed.
- LPSize's lineaspect is now named adjust_for_aspect_ratio.

Source/Core/VideoCommon/ShaderCache.cpp

@@ -1115,7 +1115,7 @@ void ShaderCache::QueueUberShaderPipelines()
     {
       // uint_output is only ever enabled when logic ops are enabled.
       config.blending_state.logicopenable = true;
-      config.blending_state.logicmode = BlendMode::AND;
+      config.blending_state.logicmode = LogicOp::And;
     }
 
     auto iter = m_gx_uber_pipeline_cache.find(config);