Change the import of kenlm from github to pypi
# What does this PR do?

Fixes #19686 

## Who can review?

@patrickvonplaten 

_The documentation is not available anymore as the PR was closed or merged._<|||||>> Thanks for your PR. The main interest of having the package on PiPy is that we can put it in our setup and not have to write a specific command to install it. You should add it to the extras for audio.

Done<|||||>Please remove all manual install of `kenlm`. I don't know if I was unclear in my previous comments, but putting it in the setup will make it installed when we do `pip install -e .[xxx]`, so there is no need for a separate install line.<|||||>> Please remove all manual install of `kenlm`. I don't know if I was unclear in my previous comments, but putting it in the setup will make it installed when we do `pip install -e .[xxx]`, so there is no need for a separate install line.

Oh, I misunderstood who you put in earlier comment. now removed.<|||||>I think we still have 2 files to be clean up ?

- docker/transformers-pytorch-gpu/Dockerfile
- docker/transformers-doc-builder/Dockerfile