[2.3.0] Checkmk Werk 16165 created: check_mk_agent: Set LC_ALL before running the agent

[//]: # (werk v2) # check_mk_agent: Set LC_ALL before running the agent key | value ---------- | --- compatible | yes version | 2.3.0b1 date | 2024-01-02T10:09:48+00:00 level | 1 class | fix component | checks edition | cre Previously, Checkmk agents would be run with a preset LC_ALL environment variable if neither C.UTF-8 or C.utf-8 locales were installed. That led to invalid agent output and crashes in section parsing in multiple checks for some of the locales. Linux, AIX, Solaris, FreeBSD and OpenWrt agents were affected. Now, LC_ALL variable is set to C for the described case.