Wav2Vec2 meets phonemes (#14353)

* up

* add tokenizer

* improve more

* finish tokenizer

* finish

* adapt speech recognition script

* adapt convert

* more fixes

* more fixes

* update phonemizer wav2vec2

* better naming

* fix more tests

* more fixes swedish

* correct tests

* finish

* improve script

* remove file

* up

* lets get those 100 model architectures until the end of the month

* make fix-copies

* correct more

* correct script

* more fixes

* more fixes

* add to docs

* Apply suggestions from code review

Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* replace assert

* fix copies

* fix docs

* new try docs

* boom boom

* update

* add phonemizer to audio tests

* make fix-copies

* up

* upload models

* some changes

* Update tests/test_tokenization_wav2vec2_phoneme.py

Co-authored-by: Anton Lozhkov <aglozhkov@gmail.com>

* more fixes

* remove @

Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
Co-authored-by: Anton Lozhkov <aglozhkov@gmail.com>

docs/source/_toctree.yml

@@ -284,6 +284,8 @@
       title: VisualBERT
     - local: model_doc/wav2vec2
       title: Wav2Vec2
+    - local: model_doc/wav2vec2_phoneme
+      title: Wav2Vec2Phoneme
     - local: model_doc/wavlm
       title: WavLM
     - local: model_doc/xlm
@@ -296,6 +298,8 @@
       title: XLNet
     - local: model_doc/xlsr_wav2vec2
       title: XLSR-Wav2Vec2
+    - local: model_doc/xls_r
+      title: XLS-R
     title: Models
   - sections:
     - local: internal/modeling_utils