message: [dashboard] update total_accounts formula
diff: "tableColumn": "",
  "targets": [
  {
  - "expr": "max(storage_gauge{op=\"state_blobs_created\"}) - max(storage_gauge{op=\"state_blobs_retired\"})",
  + "expr": "max(storage_gauge{op=\"new_state_leaves\"}) - max(storage_gauge{op=\"stale_state_leaves\"})",
  "format": "time_series",
  "instant": true,
  "intervalFactor": 1,
  