Hide Cluster Integrations tab when remove_monitor_metrics is true

What does this MR do and why?

Describe in detail what your merge request does and why.

Following the Monitor Metrics removal, I have noticed that by hiding the Cluster Health tab, the Integrations tab became redundant. It previously stored checks to enable Elastic Stack and Prometheus integrations. Elastic Stack was removed in early 2022. Now enabling Prometheus for Metrics will no longer be possible. Hence adding the Cluster Integrations tab to Metrics removal.

Screenshots or screen recordings

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How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Set up a certificate based cluster.
2. Install prometheus on to the cluster.
3. Set the remove_monitor_metrics flag.
   • rails c -> Feature.enable(:remove_monitor_metrics)
4. View the cluster integrations page.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #399231 (closed)