[2.3.0] Checkmk Werk 16246 created: Rittal temperature check regression

[//]: # (werk v2) # Rittal temperature check regression key | value ---------- | --- date | 2024-06-14T11:21:23+00:00 version | 2.3.0p7 class | fix edition | cre component | checks level | 1 compatible | yes You're affected if you're using rittal temperature checks under 2.3.0. This regression exists since 2.3.0b1 and creates the following crash: ``` File "/omd/sites/YOURSITE/lib/python3/cmk/plugins/lib/temperature.py", line 319, in check_temperature raise ValueError (Cannot compute trend. Either specify both variables 'unique_name' and 'value_store' or none.) ```