refactor(model): don't use chunk in dataset tokenized

[boss-chanon]

Why this PR

don't save tokenized to chunk

Changes

• fix load tokenized dataset
• don't save tokenized to chunk

Related Issues

Close #

Checklist

• [ ] PR should be in the Naming convention
• [ ] Assign yourself in to Assigneees
• [ ] Tag related issues
• [ ] Constants name should be ALL_CAPITAL, function name should be snake_case, and class name should be CamelCase
• [ ] complex function/algorithm should have Docstring
• [ ] 1 PR should not have more than 200 lines changes (Exception for test files). If more than that please open multiple PRs
• [ ] At least PR reviewer must come from the task's team (model, eval, data)

[boat1603]

@boss-chanon please resolved conflict

[boss-chanon]

plz review again because i convert to chunk because large dataset will out of memory if don't chunk but i fix load tokenized dataset to can load chunk data