Allow more parameters in topology view `dashboard_url_templates.service`

#### Feature Description

Allow more parameters in `ui_config.dashboard_url_templates.service`.
Parameters like `{{Service.Meta.xxx}}`.

This was actually allowed and worked back in version 1.9.x

#### Use Case(s)

Using Consul `meta` to provide links in topology visualization. For example, when registering service with:
```hcl
meta {
dashboard = "G7Z29GzMGz"
alloc_id = NOMAD_ALLOC_ID
}
```

and
```yml
ui_config:
dashboard_url_templates:
service: !unsafe "https://grafana.service.consul/d/{{Service.Meta.dashboard}}"
```

resulting link in the UI should be `https://grafana.service.consul/d/G7Z29GzMGz`