GitLab

Fetch benchmarks results on all nodes, will rsync after each benchmark.
The results directory structure on control node is as follows:

```
outputs/
└── datetime
    ├── nodes
    │   └── node-0
    │       ├── benchmarks
    │       │   ├── benchmark-0
    │       │   │   ├── rank-0
    │       │   │   │   └── results.json
    │       └── sb-exec.log
    ├── sb-run.log
    └── sb.config.yaml
```

* add cutlass as submodule.
* add build script for cutlass.
* only support compute capability 7.0(V100) and 8.0(A100)

Implement ansible client and runner:
* add ansible client
* add deploy and check_env playbooks

* call build script in Makefile.
* add cppbuild command for testing and docker env.

__Major Revisions__

* add clang-format to lint cpp sources
* add cpp lint in GitHub Actions