support eth_call for past blocks with old runtimes (polkadot-evm#1404)

* support eth_call for past blocks with old runtimes

* rustfmt

client/rpc/src/eth/execute.rs

@@ -100,7 +100,12 @@ where
 			let details = fee_details(gas_price, max_fee_per_gas, max_priority_fee_per_gas)?;
 			(
 				details.gas_price,
-				details.max_fee_per_gas,
+				// Old runtimes require max_fee_per_gas to be None for non transactional calls.
+				if details.max_fee_per_gas == Some(U256::zero()) {
+					None
+				} else {
+					details.max_fee_per_gas
+				},
 				details.max_priority_fee_per_gas,
 			)
 		};