Punish peers for duplicate GRANDPA neighbor messages (#12462)

* Decrease peer reputation for duplicate GRANDPA neighbor messages.

* Fix comparison

* Fix update_peer_state() validity condition

* Add negative test

* Rework update_peer_state() validity condition, add tests

* update_peer_state() validity condition: invert comparison

* Split InvalidViewChange and DuplicateNeighborMessage misbehaviors

* Enforce rate-limiting of duplicate GRANDPA neighbor packets

* Update client/finality-grandpa/src/communication/gossip.rs

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

* Make rolling clock back in a test safer

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>