MNT: Update hi-ml-multimodal

[fepegar]

Users (including ourselves) keep having issues installing hi-ml-multimodal. I've unpinned the requirements so it's easy to install and use. I've had to update some bits that were using ancient versions of e.g. TorchVision. I've checked the notebook and it's working fine.

Related issues:

• Unable to install hi-ml, and pytorch and torchvision could not find a version that satisfies the requirement (torch==1.9.0 torchvision==0.10.0) #927
• Please fix "pip install hi-ml-multimodal" or use my fork for a working version #916
• Installation of hi-ml-multimodal 0.2.0 not working with Python 3.10 #850

Fixes #850.
Fixes #916.
Fixes #927.

[Shruthi42]

Why the need for **kwargs here?

[fepegar]

Just so we can instantiate a classifier on top:

hi-ml/hi-ml-multimodal/src/health_multimodal/image/model/model.py

Line 57 in c61a812

self.classifier = self.create_downstream_classifier() if downstream_classifier_kwargs else None

It was necessary for one of our applications.

[fepegar]

I think the security warnings are related to cpath.