[2.4.0] Checkmk Werk 16558 created: Agent FreeBSD: Add missing Python interpreter detection

[//]: # (werk v2) # Agent FreeBSD: Add missing Python interpreter detection key | value ---------- | --- date | 2024-10-14T15:16:41+00:00 version | 2.4.0b1 class | fix edition | cre component | checks level | 1 compatible | yes The Checkmk agent for FreeBSD, like other UNIX agents, handles the execution of Python agent plugins by calling them with the available Python interpreter. However, the functions for detecting the interpreter (or a missing one) were recently missing, leading to a failure when trying to execute Python agent plugins. Thanks to darkain for this contribution!