The correct option is Automation rule.

An Automation rule can be triggered when an issue transitions into the "DEV REVIEW" status and it can create or clone an issue while copying file attachments. The built in actions let you create a new issue, clone an existing one, copy attachments and set fields so the entire process can run automatically without custom scripting.

ScriptRunner is a powerful add on that can perform this with custom scripts but it requires scripting knowledge and an additional app so it is not the simplest native solution.

Bulk Change is intended for manual batch operations across many issues and it does not run automatically on a single issue transition so it cannot meet the requirement.

Workflow post-function executes during a transition and can perform actions but the built in post functions do not provide an easy way to duplicate an issue and transfer attachments without custom code or third party apps so it is not the best choice.

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