Orbit verify

[gvladika]

Adds script which does the source code verification of all the contracts deployed by the L1AtomicTokenBridgeCreator to the Orbit chain.

Script is applicable for the verifying source code on the Blockscout explorer. Steps are following:

1. Update hardhat.config.ts. Find orbit field under networks and customChains and replace values with correct RPC and blockscout endpoints.
2. yarn install && yarn build
3. Set up .env - provide BASECHAIN_RPC , L1_TOKEN_BRIDGE_CREATOR (address of token bridge creator on parent chain) and INBOX_ADDRESS.
4. Optionally provide the DEPLOYER_KEY. That's the private key of any funded address on the Orbit chain. It is required if you want to get UpgradeExecutor and aeWETH verified. Due to specifics of cross-chain deployment used by token bridge creator, the only way to get UpgradeExecutor and aeWETH verified is to deploy dummy instances on the Orbit chain and verify them. That way the original instances will get automatically verified because of the deployed bytecode match. If DEPLOYER_KEY is not provided, this step will be skipped.
5. Run script as following: yarn run blockscout:verify --network orbit

[TucksonDev]

LGTM