[2.3.0] Checkmk Werk 16830 created: Correctly disable async mode mk-sql plugin config

[//]: # (werk v2) # Correctly disable async mode mk-sql plugin config key | value ---------- | --- date | 2024-05-07T14:56:50+00:00 version | 2.3.0p2 class | fix edition | cre component | checks level | 1 compatible | yes Previously, it was not possible to disable async mode for sections that were async by default. Since this release, the problem has been fixed.