Remove API restrictions for optimistic sync

[g11tech]

Remove throwing on the optimistic head and instead return is_execution_optimistic for the affecting apis, and let the validator handle/throw

See: ethereum/consensus-specs#2869

Changes:

• add is_optimistic to
  • getSyncingStatus api, see https://github.com/ethereum/beacon-APIs/blob/master/apis/node/syncing.yaml
• 503 error for
  • getAggregatedAttestation see https://github.com/ethereum/beacon-APIs/blob/master/apis/validator/aggregate_attestation.yaml
  • produceAttestationData see https://github.com/ethereum/beacon-APIs/blob/master/apis/validator/attestation_data.yaml
  • produceSyncCommitteeContribution see https://github.com/ethereum/beacon-APIs/blob/master/apis/validator/sync_committee_contribution.yaml
• add execution_optimistic (boolean type, true if considering protoBlock's execStatus is ExecutionStatus.Syncing) in
  • getBlockAttestations see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/blocks/attestations.yaml
  • GetBlockV2Response see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/blocks/block.v2.yaml
  • GetBlockHeaderResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/blocks/header.yaml
  • GetBlockHeadersResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/blocks/header.yaml
  • GetBlockRootResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/blocks/root.yaml
  • GetEpochCommitteesResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/blocks/committee.yaml
  • GetStateFinalityCheckpointsResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/states/finality_checkpoints.yaml
  • GetStateForkResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/states/fork.yaml
  • GetStateRootResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/states/root.yaml
  • GetEpochSyncCommitteesResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/states/sync_committes.yaml
  • GetStateValidatorResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/states/validator.yaml
  • GetStateValidatorBalancesResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/states/validator_balances.yaml
  • GetStateValidatorsResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/beacon/states/validators.yaml
  • GetDebugChainHeadsResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/debug/heads.v2.yaml
  • GetStateV2Response see https://github.com/ethereum/beacon-APIs/blob/master/apis/debug/state.v2.yaml
  • GetAttesterDutiesResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/validator/duties/attester.v2.yaml
  • GetProposerDutiesResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/validator/duties/proposer.yaml
  • GetSyncCommitteeDutiesResponse see https://github.com/ethereum/beacon-APIs/blob/master/apis/validator/duties/sync.yaml
• eventstream see https://github.com/ethereum/beacon-APIs/blob/master/apis/eventstream/index.yaml
  • head
  • finalized_checkpoint
  • chain_reorg

[g11tech]

no more relavant, mostly seem to have been addressed