Create a skaffold log event endpoint

[MarlonGamez]

1. Create skaffold log event endpoint.
2. Create an skaffold log event as per the definition

message SkaffoldLogEvent {
   string task_id = 1; // id of the task of skaffold that this log came from
   string subtask_id = 2; // id of the subtask that the log came from
   string origin = 3; // which tool the output came from ex: skaffold, docker
   logLevel level = 4; // log level
   string message = 5; // contents of the log
}

3. All skaffold logs will be available via this end point

[nkubala]

commenting to make triage party happy

[MarlonGamez]

starting on this

[tejal29]

This is now available. Shd we close this?