reorder e2e vttablet flag

go/flags/endtoend/vttablet.txt

@@ -379,6 +379,8 @@ Usage of vttablet:
  Synonym to -enable_lag_throttler
  --enable-query-plan-field-caching
  Synonym to -enable_query_plan_field_caching (default true)
+ --enable-system-health-monitor
+ Enable collection of system health metrics, currently cpu usage only.
  --enable-tx-throttler
  Synonym to -enable_tx_throttler
  --enable_consolidator
@@ -397,8 +399,6 @@ Usage of vttablet:
  Use polling to track replication lag.
  --enable_semi_sync
  Enable semi-sync when configuring replication, on primary and replica tablets only (rdonly tablets will not ack).
- --enable-system-health-monitor
- Enable collection of system health metrics, currently cpu usage only.
  --enable_transaction_limit
  If true, limit on number of transactions open at the same time will be enforced for all users. User trying to open a new transaction after exhausting their limit will receive an error immediately, regardless of whether there are available slots or not.
  --enable_transaction_limit_dry_run