Load test search index backfill under load (#41319)

GitOrigin-RevId: 2c3483d89c9e3212e78060b6bca4e7fec8066dcb

Author: emmaling27

crates/load_generator/workloads/search.json

@@ -5,19 +5,19 @@
  "name": "RunFunction",
  "path": "update",
  "fn_type": "mutation",
- "rate": 5
+ "rate": 10
  },
  {
  "name": "RunFunction",
  "path": "insert:insertMessageWithSearch",
  "fn_type": "mutation",
- "rate": 6
+ "benchmark": 50
  },
  {
  "name": "RunFunction",
  "path": "search:deleteMessageWithSearch",
  "fn_type": "mutation",
- "rate": 1
+ "rate": 5
  },
  {
  "name": "Search",