* eth/catalyst: disallow importing blocks via newPayload during snap sync

* eth/catalyst: make tests pass by using full sync only

* eth/catalysts: make the import delay a bit cleaner

* eth/catalyst: fix typo
Co-authored-by: Marius van der Wijden <m.vanderwijden@live.de>
Co-authored-by: Marius van der Wijden <m.vanderwijden@live.de>