benchmarks: add more threads arguments for sysbench benchmark
benchmarks: add more threads arguments for sysbench benchmark

Signed-off-by: Chen Hui <466a53bed58a03fb51f2feaf73d9f517efe60e47@tencent.com>

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor