feat!: RulesHooks.CanCreateContract() accepts and returns gas

[ARR4N]

Why this should be merged

Allows contract-creation allowlist hooks to consume all (or some) gas. The check is also placed equivalently to the deployer allowlist, to ensure parity with subnet-evm+coreth.

Closes #24

How this works

The hook is updated to accept gas and return gasRemaining in addition to any error. The NOOPHook simply echoes its incoming gas value.

CanCreateContract(_ *libevm.AddressContext, gas uint64, _ libevm.StateReader) (gasRemaining uint64, _ error)

The placement of the check is in keeping with the deployer allowlist, but not the IsProhibited() check. The latter is unnecessary as it checks that the 160-bit truncation of a keccak hash is not specific values¹, the pre-images of which are unknown.

How this was tested

Footnotes

1. Prohibited values are address(0) and the precompiles, which are all of the form 0x020000...00[x] where x is incrementing. ↩

[darioush]

If we drop the IsProhibited check, we can also default to consuming all gas.
But this is a nice feature so we can keep it for now