Add unix domain socket for grpc communication

[spraveenio]

Motivation

Add support to run grpc over unix domain socket for secure access

Technical Details

• reduce dependency of web services over tcp ip communication
• to enable socket based grpc new argument with the socket path to use is introduced -s, --grpc-unix-socket <path>
• gpuctl updated to check for default socket file present to automatically detect socket for gracefully switching to socket based access or revert to tcp based, arg node-svc-socket added to set non default custom socket for grpc connection

Test Plan

root@33e2dab2b163:/# ps aux
USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root           1  0.0  0.0   4364  3188 pts/0    Ss   20:37   0:00 /bin/bash -e /home/amd/tools/entrypoint.sh
root           8  0.0  0.0   4628  3812 pts/0    S+   20:37   0:00 bash
root          48  0.4  0.0 942488 31092 ?        Sl   20:46   0:00 /home/amd/bin/gpuagent -s /var/run/gpuagent.sock
root          72  0.0  0.0   4628  3932 pts/2    Ss   20:46   0:00 bash
root          91  0.0  0.0   7064  1548 pts/2    R+   20:47   0:00 ps aux
root@33e2dab2b163:/# gpuctl show gpu all | grep gpus
No. of gpus : 1
root@33e2dab2b163:/# gpuctl --node-svc-socket /var/run/gpuagent.sock show gpu all | grep -i vendor
  Card vendor                            : AMD
  Memory vendor                          : samsung
    VRAM vendor                          : samsung
root@33e2dab2b163:/