eth/catalyst: implement engine_getPayloadBodiesByHash/Range methods (#26232)

This change implements engine_getPayloadBodiesByHash and engine_getPayloadBodiesByRange, according to the specification at https://github.com/ethereum/execution-apis/blob/main/src/engine/shanghai.md#specification-4 .

Co-authored-by: Martin Holst Swende <martin@swende.se>

core/beacon/types.go

@@ -229,3 +229,9 @@ func BlockToExecutableData(block *types.Block, fees *big.Int) *ExecutionPayloadE
 	}
 	return &ExecutionPayloadEnvelope{ExecutionPayload: data, BlockValue: fees}
 }
+
+// ExecutionPayloadBodyV1 is used in the response to GetPayloadBodiesByHashV1 and GetPayloadBodiesByRangeV1
+type ExecutionPayloadBodyV1 struct {
+	TransactionData []hexutil.Bytes     `json:"transactions"`
+	Withdrawals     []*types.Withdrawal `json:"withdrawals,omitempty"`
+}