Annotate legacy OVM fields in receipt struct

Author: geoknee

core/types/receipt.go

@@ -174,10 +174,10 @@ type LegacyOptimismStoredReceiptRLP struct {
 	// However, they must not be used as they may not be populated correctly due to multiple receipt formats
 	// being combined into a single list of optional fields which can be mistaken for each other.
 	// DepositNonce (*uint64) from Regolith deposit tx receipts will be parsed into L1GasUsed
-	L1GasUsed  *big.Int `rlp:"optional"`
-	L1GasPrice *big.Int `rlp:"optional"`
-	L1Fee      *big.Int `rlp:"optional"`
-	FeeScalar  string   `rlp:"optional"`
+	L1GasUsed  *big.Int `rlp:"optional"` // OVM Legacy
+	L1GasPrice *big.Int `rlp:"optional"` // OVM Legacy
+	L1Fee      *big.Int `rlp:"optional"` // OVM Legacy
+	FeeScalar  string   `rlp:"optional"` // OVM Legacy
 }
 
 // LogForStorage is a wrapper around a Log that handles