Add a panic if a resource description is empty when collecting AllResources (#3183)

## Why
<!-- Why are these changes needed? Provide the context that the reviewer
might be missing.
For example, were there any decisions behind the change that are not
reflected in the code itself? -->
This change slightly improves developer experience when introducing a
new resource type to the asset bundle.

Before it was easy to miss that in

```
func (r *Resources) AllResources() []ResourceGroup {
	descriptions := SupportedResources()
	return []ResourceGroup{
		collectResourceMap(descriptions["jobs"], r.Jobs),
		collectResourceMap(descriptions["pipelines"], r.Pipelines),
		collectResourceMap(descriptions["models"], r.Models),
		collectResourceMap(descriptions["experiments"], r.Experiments),
		collectResourceMap(descriptions["model_serving_endpoints"], r.ModelServingEndpoints),
		collectResourceMap(descriptions["registered_models"], r.RegisteredModels),
		collectResourceMap(descriptions["quality_monitors"], r.QualityMonitors),
		collectResourceMap(descriptions["schemas"], r.Schemas),
		collectResourceMap(descriptions["clusters"], r.Clusters),
		collectResourceMap(descriptions["dashboards"], r.Dashboards),
		collectResourceMap(descriptions["volumes"], r.Volumes),
		collectResourceMap(descriptions["apps"], r.Apps),
		collectResourceMap(descriptions["my_new_resources"], r.NewResource), // <-- developer added a new line here
	}
}
```

`descriptions["my_new_resources"]` can be empty and golang does not
catch that. This results in a difficult-to-understand behaviour, when
`bundle summary` returns your new resources, but it has an empty group
name. Adding this panic ensures that the developer does not miss adding
the new resource to `SupportedResources` as well.

## Tests
<!-- How have you tested the changes? -->
Manual check - this code panics when a new resource is added to
`AllResources`, but not `SupportedResources`. This can only happen
during development when adding a new resource.

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release,
add a separate entry in NEXT_CHANGELOG.md as part of your PR. -->

Author: anton-107

bundle/config/resources.go

@@ -57,6 +57,10 @@ func collectResourceMap[T ConfigResource](
 	description resources.ResourceDescription,
 	input map[string]T,
 ) ResourceGroup {
+	if description.PluralName == "" {
+		panic("description of a resource group cannot be empty")
+	}
+
 	r := make(map[string]ConfigResource)
 	for key, resource := range input {
 		r[key] = resource