Introduce a new "External IPs" sidebar and associated dashboard factory
to display services of type LoadBalancer.
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## What this PR does
Add External IPs tab to sidebar with all `Service` resources of type
`LoadBalancer` in tenant
### Release note
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```release-note
[dashboard] add External IPs tab with `Service` resources of type `LoadBalancer`
```
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added External IPs menu item in the Administration section for quick
access to load balancer services
* Introduced a new dashboard view displaying external IPs with tabbed
interface for enhanced visibility
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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