[Benchmark] Fix client benchmark module and improve stability & coverage#630

JueBaby1120 wants to merge 1 commit intooceanbase:mainoceanbase/miniob:mainfrom

JueBaby1120:Fix-client-benchmark-module-and-improve-stability-&-coverageJueBaby1120/miniob2:Fix-client-benchmark-module-and-improve-stability-&-coverageCopy head branch name to clipboard