Eevee: Volumetrics: Support Smoke simulation textures.

It should behave like cycles.

Even if not efficient at all, we still do the same create - draw - free process that was done in the old viewport to save vram (maybe not really the case now) and not care about simulation's GPU texture state sync.

source/blender/draw/engines/eevee/eevee_engine.c

@@ -277,6 +277,8 @@ static void EEVEE_draw_scene(void *vedata)
 		}
 	}
 
+	EEVEE_effects_free_smoke_texture();
+
 	stl->g_data->view_updated = false;
 }