Revive extra prometheus metrics for performance testing

[tkxkd0159]

Descriptions

We added some prometheus metrics to do performance test. So we revert now to sync with upstream, but we can apply them again when we need. This issue was created to track such history.

ref. #46, #49, #50

Target metrics

• BlockExecutionTime : gauge value for measuring execBlockOnProxyApp<BeginBlock, DeliverTx, EndBlock> processing time => cometbft log this as histogram value
• BlockCommitTime : gauge value for measuring blockExec.Commit processing time
  -> FlushMempool + CommitSync + UpdateMempool
• BlockAppCommitTime : gauge value for measuring proxyApp.CommitSync() processing time
• BlockUpdateMempoolTime : gauge value for measuring mempool.Update processing time
• RecheckTime : gauge value for measuring mempool.Recheck processing titme
  This is not core feature. So it depends on personal preference. We need to suggest it to upstream if we really need to aggregate this metrics.
• Proposal, Prevote, Precommit, CommitExecuting, CommitCommitting, CommitRechecking, WaitingForNewRound : Cometbft logs those values as a histogram, while Ostracon additionally logs them as a gauge.