DEV: Add plugin outlet for below wizard field (#28371) (#28384)

We changed the design of the member access wizard step to use toggle groups instead of switches. To support existing designs for notices, we need another plugin outlet.

Merged in main here. This is a backport to stable.

app/assets/javascripts/discourse/app/static/wizard/components/wizard-field.gjs

@@ -90,6 +90,15 @@ export default class WizardFieldComponent extends Component {
           }}
         />
       {{/if}}
+
+      <PluginOutlet
+        @name="below-wizard-field"
+        @outletArgs={{hash
+          id=@field.id
+          disabled=@field.disabled
+          value=@field.value
+        }}
+      />
     </div>
   </template>
 }