Add ClearAll to rasterizer cache for fully wiping the cache on save/load

src/core/memory.h

@@ -283,6 +283,12 @@ enum class FlushMode {
     FlushAndInvalidate,
 };
 
+/**
+ * Flushes and invalidates all memory in the rasterizer cache and removes any leftover state
+ * If flush is true, the rasterizer should flush any cached resources to RAM before clearing
+ */
+void RasterizerClearAll(bool flush);
+
 /**
  * Flushes and invalidates any externally cached rasterizer resources touching the given virtual
  * address region.