Change Attribute\FlowDropNodeProcessor to extend Drupal\Component\Plugin\Attribute\Plugin
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3553495. -->
Reported by: [michaellander](https://www.drupal.org/user/636494)
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Because the attribute is defining the attribute for a plugin definition, it should extend:<br>
<code>Drupal\Component\Plugin\Attribute\Plugin</code> instead of the current <code>Drupal\Component\Plugin\Attribute\AttributeBase</code>. </p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Fix.</p>
issue