[2.3.0] Checkmk Werk 16781 created: Bi: service/host_label group operator now has a default operator key "and"

[//]: # (werk v2) # Bi: service/host_label group operator now has a default operator key "and" key | value ---------- | --- date | 2024-04-29T11:10:04+00:00 version | 2.3.0p1 class | fix edition | cre component | rest-api level | 1 compatible | yes When creating Bi rules via the REST-API, the host_label_groups and the service_label_groups fields both accepted a list of conditions. These conditions previously required an operator field. However, we realized that the operator field for the first item in these lists really wasn't needed and had no affect. So that the user doesn't have to provide this value, we have now added a default value for all conditions in this list of "and".