title: disabled attribute not working in symfony on radio button
body: <p>Here is my attribute</p>
  
  <pre><code>        -&gt;add(
              'target',
              DaimChoiceType::class,
              [
                  'required' =&gt; true,
                  'disabled' =&gt; $this-&gt;disabledStatus(),
                  'label' =&gt; 'attr.target',
                  'choices' =&gt; [
                      'common_settings.ui.yes' =&gt; 1,
                      'common_settings.ui.no' =&gt; 0,
                  ],
                  'label_attr' =&gt; ['class' =&gt; 'radio-inline health-target-radio'],
                  'expanded' =&gt; true,
                  'multiple' =&gt; false,
              ]
          )
  </code></pre>
  
  <p>Here is my code </p>
  
  <pre><code>    {% if viewMode is defined %}
          {% set disabled = {'attr':{'disabled': 'disabled'}} %}
      {% endif %}
  
  {{ form_row(form.healthInsuranceType.target, disabled) }} // disabled attribute not working here
  
  {{ form_row(form.healthInsuranceType.issueDate, disabled) }} //disabled attribute working here 
  </code></pre>
  
  <p>Please help me to fix the issue in symfony</p>