RDoc-3350 & RDoc-3351 Add section about cluster nodes availability #2066
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https://issues.hibernatingrhinos.com/issue/RDoc-3350/Cloud-Portal-Products-tab-update-the-Cluster-Health-section-add-nodes-availability
https://issues.hibernatingrhinos.com/issue/RDoc-3351/Cloud-Maintenance-Troubleshooting-update-the-Cluster-Health-section-add-nodes-availability