## Bug description

Last event ingested in /instance/status in system overview tab is UTC but looks like local time
Could be confusing to user to see UTC time there with no indication it's UTC.

Would be great if it showed up similar to time in live events https://app.posthog.com/events

## How to reproduce

1. Go to https://app.posthog.com/instance/status system overview tab (being in non UTC timezone) & check the "Last event ingested"

## Environment

- [x] PostHog Cloud
- [x] self-hosted PostHog (ClickHouse-based), version/commit: _please provide_
- [ ] self-hosted PostHog (Postgres-based, legacy), version/commit: _please provide_

## Additional context



#### *Thank you* for your bug report – we love squashing them!

posthog/clickhouse/system_status.py
conn.execute("SYSTEM FLUSH LOGS")
    results = conn.execute(
        """
        SELECT
            query_id,
            event_time,
            query_duration_ms,
            read_rows,
            formatReadableSize(read_bytes) as read_size,