GitLab

**Description**
Add return_code metric into result and revise unit tests.

Update network common utils. Add get_ib_devices in network common utils and move get_free_port from test utils to network common utils

* Benchmarks: Add Benchmark - add computation and communication overlap micro benchmark

* Benchmarks: Add benchmark - fix some format issues and typo

* Benchmarks: Add Benchmark - update according comments and add test

* revise tests

* skip multi gpu test due to no multi gpu
Co-authored-by: v-yujiang <v-yujiang@microsoft.com>