check_rancher2

Allow using ignore status in workload checks #29
Fixing problems with ComponentStatus health checks which were removed in Kubernetes 1.23: #35 Show Kubernetes version in single cluster check output

Improvements in plugin output: See #32 Show namespace of workload in output: See #33

Version 1.8.0 adds a lot of additional performance data to the plugin. The cluster and node performance data now show more information, including percentages of resources used (for example CPU used in percent). The plugin now also supports long parameters (-H and --apihost). Additional parameters were added to specifically trigger alerts when certain performance thresholds are reached on a node or cluster level: CPU Usage, Memory Usage or Pod Usage. Kudos and credits to @steffeneichler for this large PR!