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24328862 - fix KwargsHandler.to_kwargs not working with os.environ initialization in __post_init__ (#1738)

fix KwargsHandler.to_kwargs not working with os.environ initialization in __post_init__ (#1738) * fix KwargsHandler.to_kwargs not working with os.environ initialization in __post_init__ * fix test_torch_dynamo_plugin such that it wouldn't change os.environ permanently * move clear_os_environ func to utils/other and rename it * reformat code in order to pass ci quality check * modifiy the comment of utils.other.clear_environment