fix: tweak timeouts for aggregator and drop unnecessary check on buffering

[vasco-santos]

Over last 2 weeks, 3 pieces did not make it to an aggregate. They were received and written into PieceStore, but their insertion did not put them into a Buffer to be reduced and aggregated. This seems a edge case and happened over a week ago. I suspect that this may be related to batchItemFailures usage having some extra configurations we are not using. Probably we would need to configure something else on (On-failure destination):

Therefore, decided to just drop this, as we can rely on the length !== 2 to fail anyway and retry after.

Also tweaked some timeouts based on my observations of errors in the lambdas over the last 2 weeks based on timeouts

[seed-deploy]

View stack outputs

• pr82-w3filecoin-ApiStack

  Name	Value
  AggregatorApiCustomDomain	https://pr82.aggregator.web3.storage
  AggregatorApiEndpoint	https://yyeqte1e39.execute-api.us-east-2.amazonaws.com
  DealerApiCustomDomain	https://pr82.dealer.web3.storage
  DealerApiEndpoint	https://jcb29b5e0a.execute-api.us-east-2.amazonaws.com
  DealTrackerApiCustomDomain	https://pr82.tracker.web3.storage
  DealTrackerApiEndpoint	https://5l0svibl8i.execute-api.us-east-2.amazonaws.com

• pr82-w3filecoin-DataStack

  Name	Value
  AggregatorAggregateTableName	pr82-w3filecoin-aggregator-aggregate-store
  AggregatorBufferBucketName	pr82-w3filecoin-aggregator-buffer-store-0
  AggregatorInclusionProofBucketName	pr82-w3filecoin-aggregator-inclusion-proof-store-0
  AggregatorInclusionTableName	pr82-w3filecoin-aggregator-inclusion-store
  AggregatorPieceTableName	pr82-w3filecoin-aggregator-piece-store
  DealerAggregateStoreTableName	pr82-w3filecoin-dealer-aggregate-store
  DealerOfferStoreBucketName	pr82-w3filecoin-dealer-offer-store-0
  DealTrackerDealArchiveBucketName	pr82-w3filecoin-deal-tracker-deal-archive-store-1
  DealTrackerDealStoreTableName	pr82-w3filecoin-deal-tracker-deal-store-v1

• pr82-w3filecoin-AggregatorStack

• pr82-w3filecoin-DealerStack

• pr82-w3filecoin-DealTrackerStack