When requesting blobs by root, limit response size to request size (#… #18742

All 5 891 tests pass, 521 skipped in 56m 52s

      12 files   2 089 suites 56m 52s ⏱️
  6 412 tests   5 891 ✔️ 521 💤 0 ❌
35 681 runs 35 027 ✔️ 654 💤 0 ❌

Results for commit aec1e6a.