The eval() overrided can't be called because model is a DataParallel object in distributed.

* add AFD

remove RepVGG_B3, RepVGG_B2g2 and RepVGG_B3g2 that are not supported by PaddleClas.

fix the pretrained and inference download link;
add use_ssld arg to TNT model.

bug is that error rasied by calling update_res() when sublayer does not have _save_sub_res_hook() because nn.Sequential and nn.LayerList is not TheseusLayer.

* add distillation loss func and rec distillation

supplement to PR #1581

1. remove WrapLayer and wrap_theseus;
2. support call update_res() one more;
3. optim parse_pattern_str() to return list of layer parsed.