This is a follow-up ticket for
ChangelogStatebackend is a wrapper on top of the existing state backends. It is necessary to test/enable it by default.
However, after ChangelogStatebackend is moved to a different module, it is impossible to enable it by default for all tests due to dependency. However, we do think test coverage for ChangelogStateBackend is valuable in ITTests & End-2-end Tests.
This ticket is to address this problem.