title: Split string in two rows in Google Data Studio
body: <p>From this:</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Column A</th>
  <th>Column B</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>2021/01/01</td>
  <td>AAA, BBB</td>
  </tr>
  <tr>
  <td>2021/01/02</td>
  <td>CCC, DDD</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>To this:</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Column A</th>
  <th>Column B</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>2021/01/01</td>
  <td>AAA</td>
  </tr>
  <tr>
  <td>2021/01/01</td>
  <td>BBB</td>
  </tr>
  <tr>
  <td>2021/01/02</td>
  <td>CCC</td>
  </tr>
  <tr>
  <td>2021/01/02</td>
  <td>DDD</td>
  </tr>
  </tbody>
  </table>
  </div>