sketch out genesis predeploy check

[geoknee]

Towards #372

To get this over the line, I think the blockers are as follows:

• We need a good "ground truth" for what the standard predeploys actually are. I would have thought OP Mainnet, but then:

    superchain-genesis_test.go:75: 
                Error Trace:    /Users/georgeknee/code/ethereum-optimism/superchain-registry/validation/superchain-genesis_test.go:75
                                                        /Users/georgeknee/code/ethereum-optimism/superchain-registry/validation/validation_test.go:80
                Error:          Should be true
                Test:           TestValidation/OP_Mainnet_(10)/Standard_or_Standard_Candidate_Chain/Standard_Genesis_Predeploys
                Messages:       Genesis does not contain an account for 0x4200000000000000000000000000000000000019

• We need to fill out all of the expectations into a TOML file, read in and loop over them in this test
• Exclude (exclusions_test.go) or downgrade any chain failing the check

[geoknee]

For OP Mainnet, or in fact for any chain, if the genesis allocs are not present we have the option to go on chain (L2) and query for the information.

[geoknee]

@blmalone