[ColossalChat] Add PP support (#6001)

* support pp training

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* update rm

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* refactor

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* update test case

* fix

* change to 4

* fix eval

* test

* add pp

* hotfix

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* support pp training

* update rm

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* refactor

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* update test case

* fix

* change to 4

* fix eval

* test

* add pp

* hotfix

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* update

* skip pp eval

* update all reduce

* update sft

* update ignore

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* update no cache

* add eval

* remove fi

* remove debug

* remove parentheses to avoid warning

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* Revert "add eval"

This reverts commit 3ab2f6fa32.

* add all reduce

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

applications/ColossalChat/examples/training_scripts/train_kto.py

@@ -286,6 +286,7 @@ def train(args):
         ref_model=ref_model,
         booster=booster,
         actor_optim=optim,
+        plugin=plugin,
         actor_lr_scheduler=lr_scheduler,
         tokenizer=tokenizer,
         max_epochs=args.max_epochs,