Add bark into bettertransformer (#1199)
* first working POC of bark integration
* first POC of bark integration
* add bark to bettertranformer docs
* modify bark self attention - training is not supported so no attention_mask passed
* forward unimplemented in Bark so no test_invert_model_logits
* Update commentary regarding why bark.encodec_model is skipped
* update bark tests
* modify bark test_fp_16 to be less demanding
* Update dropout in bark self attention
Co-authored-by: fxmarty <9808326+fxmarty@users.noreply.github.com>
* make style
* fix tests, my fault!
* remove forward checker from bark class
* remove raise_autocast test from bark tests
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Co-authored-by: fxmarty <9808326+fxmarty@users.noreply.github.com>
