ValueString in Grafana 10

I noticed this comment here:

https://github.com/grafana/alerting/blob/793c67215ba14d6515b93707caeb7e6d9bf82189/templates/template_data.go#L41

Are there plans to replace `ValueString` with something easier to work with? I'm currently parsing this string in order to associate my Graphite query string with the float64 value, since

```
Values map[string]float64 `json:"values"`
```

does not offer the context I need (it only maps the `var` name to the number whereas I need the `name` label).

Start with templates/template_data.go at the linked ValueString comment and inspect how Values is exposed in Grafana 10 alerting templates. Reproduce the reported case using a Graphite query and compare the available var-to-number mapping with the needed name label context. Done should be a decided, documented approach for exposing that context or retaining the current representation.

Written by the indexing model from the issue text.