Proto,Tx_rollup: add sunset parameter

Context

Add a parameter to sunset TX rollups. It's set to about 2 years from injection (and I made a note on !4163 (closed) to change if necessary).

Manually testing the MR

Run new test. All other tests have been adjusted set the sunset paramater to max_int. This doesn't matter right now, but if tests used realistic levels, then it would matter, so we might as well make it work.

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