[bug] tenant's allowedClusters is not updated when removing a cluster is fixed

[ubo-dev]

Fixes apache#21546

Main Issue: apache#21546

Motivation

After deletion of cluster, tenant's allowed clusters Set is not updated. The deleted clusters is still available in there.

Modifications

I have edited the delete cluster method in CmdCluster file to update tenant's allowed cluster set when deletion of cluster occurs.

Verifying this change

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• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
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• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

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