GitLab

**Description**
Add gpcnet microbenchmark

**Major Revision**
- add 2 microbenmark for gpcnet, gpc-network-test, gpc-network-load-test
- add related test and example file

* add kernel launch overhead benchmark.

Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>
Co-authored-by: Yifan Xiong <yifan.xiong@microsoft.com>

Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>

Benchmarks: Add Benchmark - Add op-sharding microbenchmark, including matmul and sharding_matmul. (#36)

* add microbenchmark - sharding matmul.
* address comments.
Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>

Benchmarks: Code Revision - Revise BenchmarkRegistry interfaces for integration with executor. (#33)

* revise BenchmarkRegistry interfaces.
* address comments
Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>

* add bert-large as the model benchmark example

* add more arguments.

* address comments.

* delete duplicated file.
Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>