[2.3.0] Checkmk Werk 15646 created: KUBE: Extend `Node conditions` Rule

Title: KUBE: Extend `Node conditions` Rule Class: fix Compatible: incomp Component: checks Date: 1701104788 Edition: cre Knowledge: doc Level: 1 Version: 2.3.0b1 Previously, Checkmk identified any NodeCondition with status `True`, except for the `Ready` condition, as a problem state. However, some Kubernetes addons report custom NodeConditions. In some cases, the `True` status of these conditions is desired. With this Werk, this is fully configurable. Since there are no longer pre-defined problem states, the NodeConditions are now shown in the summary based on their monitoring states. The affected rule `Node conditions` has been renamed to `Kubernetes node conditions`. The default rules ensure that the monitoring states of existing services do not change. Existing rules are migrated. Manual intervention is only needed if there are multiple `Kubernetes node conditions` rules, which apply the to the same service. Previously, each NodeCondition would use the rule with a matching parameter. The new rule contains only a single parameter, thus only the first rule applies. Moreover, some minor tweaks have been done. * The check falsely reported `.status.message` to be `None`. The proper message is now shown. * NodeConditions are now shown in the order they are received from the Kubernetes API. * The check no longer shows `NodeConditionStatus.FALSE`, instead it now shows `False`. * The check is unaffected if one of the following conditions is missing: `Ready`, `MemoryPressure`, `PIDPressure`, `DiskPressure`. This should not affect the monitoring since the Kubernetes API server ensures that these conditions are always present.