layoutlmv3 processor 
### System Info

```shell
The cache for model files in Transformers v4.22.0 has been updated. Migrating your old cache. This is a one-time only operation. You can interrupt this and resume the migration later on by calling `transformers.utils.move_cache()`.
There was a problem when trying to move your cache:

  File "/opt/conda/lib/python3.7/site-packages/transformers/utils/hub.py", line 1551, in <module>
    move_cache()

  File "/opt/conda/lib/python3.7/site-packages/transformers/utils/hub.py", line 1491, in move_cache
    cached_files = get_all_cached_files(cache_dir=cache_dir)

  File "/opt/conda/lib/python3.7/site-packages/transformers/utils/hub.py", line 1397, in get_all_cached_files
    for file in os.listdir(cache_dir):
```


### Information

- [ ] The official example scripts
- [ ] My own modified scripts

### Tasks

- [X] An officially supported task in the `examples` folder (such as GLUE/SQuAD, ...)
- [X] My own task or dataset (give details below)

### Reproduction

The cache for model files in Transformers v4.22.0 has been updated. Migrating your old cache. This is a one-time only operation. You can interrupt this and resume the migration later on by calling `transformers.utils.move_cache()`.
There was a problem when trying to move your cache:

  File "/opt/conda/lib/python3.7/site-packages/transformers/utils/hub.py", line 1551, in <module>
    move_cache()

  File "/opt/conda/lib/python3.7/site-packages/transformers/utils/hub.py", line 1491, in move_cache
    cached_files = get_all_cached_files(cache_dir=cache_dir)

  File "/opt/conda/lib/python3.7/site-packages/transformers/utils/hub.py", line 1397, in get_all_cached_files
    for file in os.listdir(cache_dir):

### Expected behavior

```shell
install the processor
```


### Checklist

- [X] I have read the migration guide in the readme. ([pytorch-transformers](https://github.com/huggingface/transformers#migrating-from-pytorch-transformers-to-transformers); [pytorch-pretrained-bert](https://github.com/huggingface/transformers#migrating-from-pytorch-pretrained-bert-to-transformers))
- [X] I checked if a related official extension example runs on my machine.
cc @sgugger <|||||>Is that the entire stacktrace, @founou-rihab ?