[release-4.7] Bug 1942068: Gahter datahubs.installers.datahub.sap.com resources from SAP clusters (#383)

* Gather SAP datahubs resources

* Add test for SAP datahubs resource gathering

* Enable SAP datahubs gathering

* Add SAP datahubs section to docs

* Add SAP datahubs resource to sample archive

* Use datahubs GVR const

Author: natiiix

docs/gathered-data.md

@@ -415,6 +415,13 @@ Response see https://docs.openshift.com/container-platform/4.6/rest_api/workload
 Location in archive: config/pod/{namespace}/logs/{pod-name}/errors.log
 
 
+## SAPDatahubs
+
+collects `datahubs.installers.datahub.sap.com` resources from SAP/SDI clusters.
+
+Location in archive: customresources/installers.datahub.sap.com/datahubs/<namespace>/<name>.json
+
+
 ## SAPPods
 
 collects information about pods running in SAP/SDI namespaces.