fix token state json and mistral tokenizer issue (#3522) [skip ci]

* fix token state json and mistral tokenizer issue

* centralize constants

* forgot to commit constants file

* Fix weakref in pickling relora state dict

* make curl a bit quieter so it doesn't log 2K lines

* fix path traversal for olmoe test

* more test fixes that weren't flagged previously

* chore: lint

* skip tests that fail b/c of OutOfResources

* scattermoe as slow tests

* update fbgemm-genai for torch 2.10

tests/e2e/test_dpo.py

@@ -262,6 +262,7 @@ class TestDPOLlamaLora(unittest.TestCase):
         train(cfg=cfg, dataset_meta=dataset_meta)
         check_model_output_exists(Path(temp_dir) / "checkpoint-20", cfg)
 
+    @pytest.mark.skip(reason="TRL ORPO trainer has internal zip() length mismatch bug")
     @with_temp_dir
     def test_orpo_lora(self, temp_dir):
         cfg = DictDefault(