Not chunked upload to HTTP remote

[scotty3005]

Hi,
recently I have experimented with DVC and HTTP remotes.
Problems that I had to solve:

• Server was not allowing HEAD requests and responding to the GET request had status code 404, which is not actually checked by DVC.
• Server not accepting chunked uploads

It would be super helpful to be able to detect the possibility to send or not chunked file uploads or at least a configuration option to do so. I tried to write a draft solution at the following PR iterative/dvc#6117

I will be happy eventually improve on that in order to provide DVC with the feature above mentioned.