[Multi-chain] Merge `alt-l1` branch to develop branch

[boyuan-chen]

Discussion

Things have to be done for merging alt-l1 branch to develop branch

l2geth

• [need to check] The new token price logic might not be compatible with the geth client for Ethereum L2

contracts

• [change] The function names for multi chain contracts are different. How to solve it?
• [change] The unit tests for those contracts
• [change] The native token on Ethereum L2 is ETH, but it's BOBA on other chains

integration tests

• [change] The function names for multi chain contracts are different. How to solve it?

Gateway

• [change] Some pages need to be hidden
• [change] The function names are different