Add timestamp to agent log

[tevoinea]

Summary of the Pull Request

What is this about?

Adds timestamp to agent tracing log output.

PR Checklist

• Applies to work item: Add timestamps to agent logs #1939
• Tests added/passed
• Requires documentation to be updated
• I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

Info on Pull Request

What does this include?

• Rename LogEvent -> LoggingEvent
• Create LogTrace and LogEvent structs to organize necessary logging info https://github.com/microsoft/onefuzz/pull/1972/files#diff-52c53d4179505ba0dd3f46e2707afeb66f5208e6138b52159fd48134af41a73fR340-R356
• All agent logs now prepend the UTC timestamp
• Test to validate the behavior

Validation Steps Performed

How does someone test & validate?

Ran check-pr, checked the blob logs and the AI logs.

[chkeita]

Adding the timestamp directly in the message might be redundant with app insight since everything gets a timestamp there. If the goal is to have it in the written logs we might want to format the message in the task logger instead

[stishkin]

Any chance we don't write stuff to AppInisghts from the Agent ? Maybe only errors ? And the rest of the logs are kept in files ?

There is so much noise in App Inisghts right now, is it required ?

[tevoinea]

Any chance we don't write stuff to AppInisghts from the Agent ? Maybe only errors ? And the rest of the logs are kept in files ?

There is so much noise in App Inisghts right now, is it required ?

We definitely could start removing stuff from AI after this change makes it in. I would propose moving traces to log file only and keep events and errors in AI as a first step. I'll create an issue