Add BloomForSequenceClassification and BloomForTokenClassification classes (#17639)

* add new bloom classes

* (feat) add bloom classification tests; make style

* style: change import in test

* add some typehints to bloom classes

* merge main into branch

* fix: input checking in bloom seq classification

* fix tests

* change model class tests

* fix few tests

- more tests should pass
- one test left

* make token classifier return hidden states

* style: make BLOOM typehints consistent

Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>

Co-authored-by: younesbelkada <younesbelkada@gmail.com>
Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>

docs/source/en/model_doc/bloom.mdx

@@ -44,4 +44,14 @@ Several smaller versions of the models have been trained on the same dataset. BL
 ## BloomForCausalLM
 
 [[autodoc]] BloomForCausalLM
+    - forward
+
+## BloomForSequenceClassification
+
+[[autodoc]] BloomForSequenceClassification
+    - forward
+
+## BloomForTokenClassification
+
+[[autodoc]] BloomForTokenClassification
     - forward