Context

This MR introduces the refutation logic in the rollup node.

It also includes:

several bugfixes and minor improvements found along the way ;
a loser mode in the rollup node to introduce intended failures at strategic points ;
an end-to-end scenario to check that refutation game punishes dishonest nodes.

Manually testing the MR

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

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

Edited Jul 13, 2022 by Yann Regis-Gianas