Add WavLM (#14354)
* first commit
* fix some stuff
* fix more readme
* Apply suggestions from code review
* update
* correct
* up
* attn layer works
* push code
* make modedls work
* Small change
* more refactor
* finish
* up
* fix convertsion
* fix position bias
* Fix style
* fix conversion
* make fix-copies
* add
* clean
* fix docs
* fix
* Apply suggestions from code review
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
* apply final changes
* make fix-copies
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>