allow jmh benchmarks to be cached for faster ci runs #4496

All 10 513 436 tests pass in 2h 55m 53s

10 513 436 tests ±0 10 513 436 ✅ ±0 2h 55m 53s ⏱️ + 2m 28s
1 051 suites ±0 0 💤 ±0
1 051 files ±0 0 ❌ ±0

Results for commit aa490e2. ± Comparison against earlier commit baa540a.