JVET-AC0089: models and training scripts

Du Liurequested to merge
duliu/vvc-software-vtm-nnvc:AC0089-lfs-models-training-scripts into VTM-11.0_nnvc

Add git lfs tracked models and change default model paths of filter set 1 to the new models. Add training scripts of JVET-AC0089.

Edited by Du Liu

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