Pin `Pillow` for now
# What does this PR do?

`Pillow 10.0.0` is out 2 days ago.

Our CI get errors (via the usage of `detectron2`):

```bash
...
/usr/local/lib/python3.8/dist-packages/detectron2/data/transforms/transform.py:36: in <module>
...
>       def __init__(self, src_rect, output_size, interp=Image.LINEAR, fill=0):
E       AttributeError: module 'PIL.Image' has no attribute 'LINEAR'
``` 

This is due to the previous deprecation and the removal now
```bash
<stdin>:1: DeprecationWarning: LINEAR is deprecated and will be removed in Pillow 10 (2023-07-01). Use BILINEAR or Resampling.BILINEAR instead.
```

This PR pins `Pillow` for now until `detectron2` fixes it.

_The documentation is not available anymore as the PR was closed or merged._<|||||>Merge as the 2 failed tests seems flaky.