feat : QueryActivatedHeight()

[XiangEnze]

Summary

• implement QueryActivatedHeight
• add querynextBlockNumberto compute the block number of the next L2 block that needs to be checkpointed.
• add queryBestBlockto find the first block where the block.number >= l1_activated_height in event OutputProposed
• add codes and notes for l1 oracle contract VotingPowerUpdated event parts in comments
• delete useless L2outputOracle parts
  - this pull request is not a completed request as functions are not fully implement, it can be used for discussion about the final designing for l1 oracle contract.

Next Steps:

• implement QueryFinalityProviderVotingPower

Question:

• How do we get votingPower from L1 oracle contract by tag, there will be function like getVotingPowerbyNumber() or we also find information in event?
• As far as I understand, every time the votingPower is updated, an event VotingPowerUpdated will emit, but we always only need the number when it is first set ?
• For the activatedHeight, do we still need find the first block from EOTSVerifier bigger than FP oracle activated height ?

Test Plan

make mock-gen
make test