batches: Fix diff unavailable after step finishes
Created by: Piszmog
Closes #38600 (closed).
The callback queryFileDiffs will only update if there are changes to the dependencies. When a step has a state change (for example finishes), this function does not get re-ran since none of the dependencies changed.
I decided to pass the whole step instead of the step number. This way, then the step has changes (for example finishes), this would cause the useCallback to rerun.
Test plan
Manual testing (see video)
App preview:
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