fix: add storage padding in L1GasPriceOracle

[Thegaram]

Ensure that isFeynman and isGalileo each have their own dedicated storage slot.

> forge inspect src/L2/predeploys/L1GasPriceOracle.sol:L1GasPriceOracle storageLayout

╭--------------------+---------------------+------+--------+-------+---------------------------------------------------------╮
| Name               | Type                | Slot | Offset | Bytes | Contract                                                |
+============================================================================================================================+
...
|--------------------+---------------------+------+--------+-------+---------------------------------------------------------|
| isFeynman          | bool                | 11   | 0      | 1     | src/L2/predeploys/L1GasPriceOracle.sol:L1GasPriceOracle |
|--------------------+---------------------+------+--------+-------+---------------------------------------------------------|
| __gap              | uint248             | 11   | 1      | 31    | src/L2/predeploys/L1GasPriceOracle.sol:L1GasPriceOracle |
|--------------------+---------------------+------+--------+-------+---------------------------------------------------------|
| isGalileo          | bool                | 12   | 0      | 1     | src/L2/predeploys/L1GasPriceOracle.sol:L1GasPriceOracle |
╰--------------------+---------------------+------+--------+-------+---------------------------------------------------------╯