Increase attestation seen cache exp time to two epochs (#14156)

beacon-chain/operations/attestations/kv/kv.go

@@ -32,7 +32,7 @@ type AttCaches struct {
 // various kind of attestations.
 func NewAttCaches() *AttCaches {
 	secsInEpoch := time.Duration(params.BeaconConfig().SlotsPerEpoch.Mul(params.BeaconConfig().SecondsPerSlot))
-	c := cache.New(secsInEpoch*time.Second, 2*secsInEpoch*time.Second)
+	c := cache.New(2*secsInEpoch*time.Second, 2*secsInEpoch*time.Second)
 	pool := &AttCaches{
 		unAggregatedAtt: make(map[attestation.Id]ethpb.Att),
 		aggregatedAtt:   make(map[attestation.Id][]ethpb.Att),