[test] fix blobs fs backend benchmarks to account for multiple rounds

3 jobs for master in 150 minutes and 5 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Benchmarks
failed memory #31302
benchmark

failed responsiveness #31303
benchmark

failed time-cpu #31301
benchmark

02:30:05

 
Name Stage Failure
failed
memory Benchmarks There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job log
failed
time-cpu Benchmarks There is an unknown failure, please try again
No job log
failed
responsiveness Benchmarks There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job log