fix: write per-cluster files during node prep - #9225

  3 files  ±0   13 suites  ±0   42s ⏱️ -7s
404 tests ±0  404 ✅ ±0  0 💤 ±0  0 ❌ ±0 
407 runs  ±0  407 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 5bad43e. ± Comparison against earlier commit a68e087.