[2.3.0] Checkmk Werk 17268 created: Opsgenie: use Checkmk CA trust store

[//]: # (werk v2) # Opsgenie: use Checkmk CA trust store key | value ---------- | --- date | 2024-10-17T13:15:56+00:00 version | 2.3.0p19 class | fix edition | cre component | notifications level | 1 compatible | yes The Opsgenie notification plugin will now use the Checkmk CA trust store (`~/var/ssl/ca-certificates.crt`) if an HTTP proxy is configured.