`Missing logger folder Warning` due to `isdir` of  `fsspec`
🐛 Bug

I linked a folder to PROJECT_ROOT/lightning_logs, but pytorch-lightning showed the warning Missing logger folder: PROJECT_ROOT/lightning_logs, and then wrote the tensorboard event log file to PROJECT_ROOT/lightning_logs/version_0, instead of creating a new version_xxx.
I think this is because in this case, fsspec's isdir returns False, while python os.path.isdir returns True . Please refer to https://github.com/PyTorchLightning/pytorch-lightning/blob/master/pytorch_lightning/loggers/tensorboard.py#L241 for details.