Decrease fluentd chunks size
What does this MR do and why?
We're still observing errors in fluentd logs, like in this CI run for example:
2024-10-27 23:38:36 +0000 [warn]: #0 [clusterflow:cattle-logging-system:all-logs:clusteroutput:cattle-logging-system:loki] failed to write post to http://loki-gateway.loki.svc.cluster.local/loki/api/v1/push (413 Request Entity Too Large <html>
<head><title>413 Request Entity Too Large</title></head>
<body>
<center><h1>413 Request Entity Too Large</h1></center>
<hr><center>nginx/1.27.2</center>
</body>
</html>
)Decrease chunks size (and timekey otherwise it won't fit any more in it)
Related reference(s)
relates-to #1510 (closed)