title: Convert string to YAML map
body: <p>In values.yaml I have another yaml config encoded to base64. In a template I decode it with</p>
  <pre><code>{{ $config := b64dec .Values.config }}
  </code></pre>
  <p>and I need to access it like a map, so what is needed is a kind of analogue of file AsConfig but for string.</p>