[2.4.0] Checkmk Werk 16855 created: bi: Fix crash for services with special characters

[//]: # (werk v2) # bi: Fix crash for services with special characters key | value ---------- | --- date | 2024-05-22T14:52:45+00:00 version | 2.4.0b1 class | fix edition | cre component | bi level | 1 compatible | yes Previously, the BI would crash if a service name had special characters (e.g. emoticons). The error was: "Internal error: ('utf-8', 'bi:aggregation_lookup..., 'surrogates not allowed')". The BI now handles and shows special characters correctly.