<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#40540
Almost done with slog migration.
# Checklist for submitter
- [ ] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
- Changes present in previous PR
## Testing
- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Chores**
* Updated internal logging infrastructure to use Go's standard logging
library, modernizing the logging system while maintaining existing
functionality and error handling behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Victor Lyuboslavsky
bf9180e6e3