Unix epoch in seconds is handled as if it were milliseconds.

### What happened? I have a sql server datasource with this line: `$__timeEpoch(HMSTimestamp)` this results in unix epoch in seconds: `DATEDIFF(second, '1970-01-01', HMSTimestamp) AS time` But when looking at data from '2001-01-01 00:00:00' to '2001-01-31 23:59:59' grafana handles this timestamps as if it were milliseconds: The timestamp: `978307200` does not result to 2001-01-01 00:00:00, but result to: '1970-01-12 07:45:07' ### What did you expect to happen? Unix epoch `978307200` should be `2001-01-01 00:00:00` ### Did this work before? Yes. In version 9 of grafana we checked this thouroughly, I have no idea (yet) in what version it stopped working. ### How do we reproduce it? 1. Have datasource with unix timestamps, 2. Look at 2001-01-01 ### Is the bug inside a dashboard panel? _No response_ ### Environment (with versions)? Grafana: 2001-01-01 00:00:00 OS: Windows Browser: Edge - 140.0.3485.66 (Official build) (64-bit) ### Grafana platform? None ### Datasource(s)? Sql server