title: Automatically add helm repos to new clusters
body: <p>As the title says, is it possible to configure clusters/templates to automatically provision with custom helm repos?</p>
  <p>In case there's confusion, I'm talking about the Apps &gt; Repositories menu in rancher when you're &quot;Exploring&quot; a cluster.</p>
  <p>It defaults with these two repos for new clusters:</p>
  <pre><code>https://git.rancher.io/partner-charts
  https://git.rancher.io/charts
  </code></pre>