take bendctl to replace perf-tool

[flaneur2020]

now we have got the cli to access our cloud platform bendctl, we can consider replacing the cli perf-tool to bendctl.

the problems with perf-tool:

• the test logic is hard coded inside the cli tool, hard to customize the test logic by python script.
• the api client is manual written and have some adhoc logic inside, it does not handle some corner cases like 520 well.
• hard to reproduce the failed case on desktop.

the pros about bendctl:

• allowing us seperate the api client logic with the test workflow logic (like run each query 10 times for ontime dataset)
• have a more stable fundation about the api access logic like session management, warehouse management, retry, etc.

[flaneur2020]

#110 replaces the reload part into bendctl.

we can further replace the benchmark part into bendctl.