Notification templates : editor transforms firing to resolved

### What happened? grafana 11.1.3 When editing a template in the builtin editor, 'firing' alerts in the test payload are transformed to resolved ones. template: ` {{ define "infradevops-tp-main-v2.subject" }} {{- len .Alerts.Firing }} firing {{- if .Alerts.Resolved }}, {{ len .Alerts.Resolved }} resolved{{ end }} {{ end }} {{ define "infradevops-tp-main-v2.message" }} {{ range .Alerts.Firing }} Status: {{ .Status }} Starts at: {{ .StartsAt }} {{ end }} {{- end -}} ` payload: ` [ { "status": "firing", "annotations": { "summary": "Instance instance1 has been down for more than 5 minutes" }, "labels": { "alertname": "InstanceDown", "instance": "instance1" }, "startsAt": "2024-12-08T13:54:01.050Z", "endsAt": "2024-12-09T13:59:01.050Z", "fingerprint": "a5331f0d5a9d81d4", "generatorURL": "http://grafana.com/alerting/grafana/cdeqmlhvflz40f/view" }, { "status": "resolved", "annotations": { "summary": "CPU usage above 90%" }, "labels": { "alertname": "CpuUsage", "instance": "instance1" }, "startsAt": "2024-12-09T09:54:01.050Z", "endsAt": "2024-12-09T13:54:01.050Z", "fingerprint": "b77d941310f9d381", "generatorURL": "http://grafana.com/alerting/grafana/oZSMdGj7z/view" } ] ` result  ### What did you expect to happen? I expected `1 firing, 1 resolved` & 2 blocks in message ### Did this work before? dunno ### How do we reproduce it? 1. test given template & payload ### Is the bug inside a dashboard panel? _No response_ ### Environment (with versions)? Grafana: 11.1.3 OS: ubuntu Browser: firefox ### Grafana platform? Docker ### Datasource(s)? _No response_