[2.3.0] Checkmk Werk 16840 created: mk-sql correctly reports errors

[//]: # (werk v2) # mk-sql correctly reports errors key | value ---------- | --- date | 2024-06-10T07:39:27+00:00 version | 2.3.0p6 class | fix edition | cee component | checks level | 1 compatible | yes Previously, mk-sql did not attach the prefix `ERROR: ` to an error. As a result, the check engine couldn't parse the error correctly and may report missing service. With this release, the problem has been fixed.