bug #28469 [Form][TwigBridge] fix not displaying labels when value is false (xabbuh)

This PR was merged into the 4.1 branch.

Discussion
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[Form][TwigBridge] fix not displaying labels when value is false

| Q             | A
| ------------- | ---
| Branch?       | 4.1
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #28198
| License       | MIT
| Doc PR        |

Commits
-------

c4a6c9fa00 fix not displaying labels when value is false

Author: nicolas-grekas

Extension/Core/Type/DateTimeType.php

@@ -120,6 +120,11 @@ public function buildForm(FormBuilderInterface $builder, array $options)
                 'invalid_message_parameters',
             )));
 
+            if (false === $options['label']) {
+                $dateOptions['label'] = false;
+                $timeOptions['label'] = false;
+            }
+
             if (null !== $options['date_widget']) {
                 $dateOptions['widget'] = $options['date_widget'];
             }