## What this PR does
When VMs are created without a public IP, no service is created for them
and they have no in-cluster DNS name. This PR fixes this and resolves
#1731.
### Release note
```release-note
[vm] Always expose VMs with at least a ClusterIP service.
```
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## Summary by CodeRabbit
* **Improvements**
* Service templates now conditionally enable external-specific
annotations and settings when external mode is enabled.
* External LoadBalancer deployments support richer port configuration
(including whole-IP fallback), while internal services retain a single
default port (65535).
* External traffic policy and node port allocation are applied only in
external mode to preserve internal behavior.
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settings.</sub>
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