[BUG] create_train_split.py create wrong path when FT VITS

[AliceNavigator]

微调VITS时使用python tools/vqgan/create_train_split.py data创建的vq_train_filelist.txt内部路径类似 data\Yanfei\vo_YFLQ001_11_yanfei_02.wav 然而实际使用的路径是 Yanfei\vo_YFLQ001_11_yanfei_02.wav

如果直接使用分割脚本创建的路径会在Sanity Check时报错： RuntimeError: max(): Expected reduction dim to be specified for input.numel() == 0. Specify the reduction dim with the 'dim' argument.