enable disputes (#3478)

* initial integration and migration code

* fix tests

* fix counting test

* assume the current version on missing file

* use SelectRelayChain

* remove duplicate metric

* Update node/service/src/lib.rs

Co-authored-by: Robert Habermeier <[email protected]>

* remove ApprovalCheckingVotingRule

* address my concern

* never mode for StagnantCheckInterval

* REVERTME: some logs

* w00t

* it's ugly but it works

* Revert "REVERTME: some logs"

This reverts commit e210505a2e83e31c381394924500b69277bb042e.

* it's handle, not handler

* fix a few typos

Co-authored-by: Robert Habermeier <[email protected]>