Reinstate 'scheduler' benchmarks. Upper bound on streamly was removed. Fix #4983
Reinstate 'scheduler' benchmarks. Upper bound on streamly was removed. Fix #4983

iand675/stackage,massysett/stackage,fpco/stackage,asr/stackage,stackbuilders/stackage,jonschoning/stackage,athanclark/stackage,soenkehahn/stackage,michalkonecny/stackage,Daniel-Diaz/stackage,clinty/stackage,mrkkrp/stackage,simonmichael/stackage