grpc benchmark initial

[XThomasBU]

Initial Setup for Benchmarking

• Follows the methods from https://github.com/facebookresearch/DomainBed/tree/main
• On a high level, follows the workflow detailed in grpc_expts/benchmarking.md

TODO

• Cleanup Code
• 'Done' File not created for the runs
• Bug Fixes and Enhancements (replace hard-coded values, create a table to aggregate and benchmark results, etc)
• Fix how clients/server are assigned devices

[XThomasBU]

@tremblerz Added an initial pipeline for creating the sweep runs with the existing grpc code. Have shown an example at grpc_expts/benchmarking.md