gl_texture_cache: Fix layered texture attachment base level

The base level is already included in the texture view. If we specify
the base level in the texture again, this will end up in the incorrect
level and potentially out of bounds.

src/video_core/renderer_opengl/gl_texture_cache.cpp

@@ -417,7 +417,7 @@ void CachedSurfaceView::Attach(GLenum attachment, GLenum target) const {
 
         switch (params.target) {
         case SurfaceTarget::Texture2DArray:
-            glFramebufferTexture(target, attachment, GetTexture(), params.base_level);
+            glFramebufferTexture(target, attachment, GetTexture(), 0);
             break;
         default:
             UNIMPLEMENTED();