[DAC] Stop rollup node if reveal hash data is wrong

Context

The rollup node should stop if it reads some reveal preimage whose hash does not correspond to the filename. This MR also contains some UX improvements around the reveal logic.

Closes: #4199 (closed)

Manually testing the MR

dune exec tezt/tests/main.exe -- --file sc_rollup.ml reveals

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR