Make log timestamps configurable

[NickJH]

Current Behavior

Currently, if you set hostd to output to syslog, looking at journalctl, you see something like:

Oct 08 20:21:54 hostd hostd[3800939]: 2025-10-08T20:21:54+01:00        INFO        rhp4.siamux        RPC success        {"peerAddress": "15.204.160.10:33222", "streamID": "b0c3befb", "rpc": "Settings", "elapsed": "569.643µs"}

Note that there are two timestamps. The first comes from systemd for every message from every app and the second comes from hostd.

Expected Behavior

It would be better to suppress hostd's timestamp from the message.

Steps to Reproduce

No response

Version

2.4.1

Anything else?

This is observable in Debian 12 and Ubuntu 24.04.