message: [executor] update save timer, add counter for txn count in single request"
  Add a counter to number of transactions that are sent in every `save_transactions` request.
  Update the request duration to use easier timer and default units
diff: @@ -531,16 +531,16 @@ where
  let num_txns_to_commit = txns_to_commit.len() as u64;
  {
  - let time = std::time::Instant::now();
  + let _timer = OP_COUNTERS.timer("storage_save_transactions_time_s");
  + OP_COUNTERS.observe(
  + "storage_save_transactions.count",
  + txns_to_commit.len() as f64,
  + );
  self.storage_write_client.save_transactions(
  txns_to_commit,
  version + 1 - num_txns_to_commit, /* first_version */
  Some(ledger_info_with_sigs.clone()),
  )?;
  - OP_COUNTERS.observe(
  - "storage_save_transactions_time_us",
  - time.elapsed().as_micros() as f64,
  - );
  }
  // Only bump the counter when the commit succeeds.
  OP_COUNTERS.inc_by("num_accounts", num_accounts_created);
  