enable disputes for known chains, except for polkadot (#4464)

* enable disputes, for all known chains but polkadot

* chore: fmt

* don't propagate disputes either

* review

* remove disputes feature

* remove superfluous line

* Update node/service/src/lib.rs

Co-authored-by: Andronik Ordian <[email protected]>

* fixup

* allow being a dummy

* rialto

* add an enum, to make things work better

* overseer

* fix test

* comments

* move condition out

* excess arg

Co-authored-by: Andronik Ordian <[email protected]>