Other changes:
* logtrace can now verify sync committee messages and contributions
* Many unnecessary use of pairs() have been removed for consistency
* Map 40x BN response codes to BeaconNodeStatus.Incompatible in the VC
* add aggregated attestation tracing to logtrace and enable it in Jenkins CI
* use a slightly less cryptic acronym than aasr
* mostly, nimbus and the eth2 spec use aggregate attestation, not aggregated attestation