Add fio command to curveadm

[ilixiaocui]

Describe the feature you'd like:

Add fio command to curveadm. fio is a general-purpose performance testing tool. We can directly execute curveadm fio --id {ID} to perform performance test on the cluster.

Teachability, Documentation, Adoption, Migration Strategy:

develop refrence: https://github.com/opencurve/curveadm/wiki/others#%E5%8F%82%E4%B8%8E-curveadm-%E7%9A%84%E5%BC%80%E5%8F%91

[mouuii]

I'd like to try it

[Cyber-SiKu]

Please note that the code submission deadline for this developer activity is December 3rd :)
@mouuii