fix(archiver): do not error if proposed block matches checkpointed#21367

PhilWindle merged 2 commits intomerge-train/spartanAztecProtocol/aztec-packages:merge-train/spartanfrom

palla/no-error-if-proposed-block-is-checkpointedAztecProtocol/aztec-packages:palla/no-error-if-proposed-block-is-checkpointedCopy head branch name to clipboard