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## What this PR does
### Release note
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```release-note
[kubernetes] Add lb tests for tenant k8s
```
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## Summary by CodeRabbit
* **Tests**
* Increased readiness and port-forward timeouts to improve stability.
* Added full end-to-end provisioning and validation: automated namespace
and backend deployment, load balancer provisioning, health checks with
retries, reachability validation, and cleanup.
* Provisioning sequence now runs earlier and is duplicated within the
test flow, altering execution order and adding extra validation/cleanup
steps.
<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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