Adding LatencyBench test to measure peer-to-peer latency between two GPUs

[mberenjk]

…GPUs

Details

Do not mention proprietary info or link to internal work items in this PR.

Work item: LWPCOMMLIBS-143 What were the changes?
adding LatencyBench test to measure peer-to-peer latency between two GPUs

Why were the changes made?
Adding a ping-pong latency test.

How was the outcome achieved?

Additional Documentation:

Approval Checklist

Do not approve until these items are satisfied.

• [ ] Verify the CHANGELOG has been updated, if
  • there are any NCCL API version changes,
  • any changes impact library users, and/or
  • any changes impact any other ROCm library.

[nileshnegi]

please add LICENSE section to both files.