bug: avoid failing when not finding status expressions

The status paths might not have been written at the time of first n executions
and should only be retried on new reconcile attempts.

pkg/spi/types.go

@@ -105,7 +105,8 @@ func NewPathExpressionExtractor(paths []string) HostExtractor {
 			return foundHosts, nil
 		}
 
-		return nil, fmt.Errorf("neither string nor slice of strings found at path %v", splitPath)
+		// TODO: Nothing found yet, move on no error?
+		return []string{}, nil
 	}
 
 	return func(target *unstructured.Unstructured) ([]string, error) {