title: get layer names in virtual layer query
body: <p>Can I get a list of layer names in a virtual layer query?</p>
  <p>Essentially something like</p>
  <pre><code>SELECT name
  FROM sqlite_master
  WHERE name LIKE 'srcData%'
  </code></pre>
  <p>to get all layer names starting with srcData.</p>
  <p>I am using QGIS 3.16</p>