[2.4.0] Checkmk Werk 16179 created: size_trend: Treat negative free space as 0 in all cases

[//]: # (werk v2) # size_trend: Treat negative free space as 0 in all cases key | value ---------- | --- compatible | yes version | 2.4.0b1 date | 2024-03-20T10:04:09+00:00 level | 1 class | fix component | checks edition | cre Before the version 2.2.0p21, 'Time left until full' was reported to be 0 in case of devices reporting negative free space. With werk 16330, we stopped reporting the metric in case of very small size changes because it lead to infinite values. With this change the behavior was unintentionally also changed for negative free space values. This werk restores the same functionality in case of negative free space.