minor #11934 [Form] Fix PHPDoc for builder setData methods (MisatoTremor)

This PR was merged into the 2.3 branch.

Discussion
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[Form] Fix PHPDoc for builder setData methods

| Q             | A
| ------------- | ---
| Fixed tickets | #11933
| License       | MIT

The underlying data variable is typed as mixed whereas the methods paramers where typed as array.
The method is also described to accept objects, etc. in the documentation.

Commits
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c207d1d [Form] Fix PHPDoc for builder setData methods The underlying data variable is typed as mixed whereas the methods paramers where typed as array.

Author: fabpot

src/Symfony/Component/Form/ButtonBuilder.php

@@ -425,7 +425,7 @@ public function setType(ResolvedFormTypeInterface $type)
      *
      * This method should not be invoked.
      *
-     * @param array $data
+     * @param mixed $data
      *
      * @throws BadMethodCallException
      */

src/Symfony/Component/Form/FormConfigBuilderInterface.php

@@ -212,7 +212,7 @@ public function setType(ResolvedFormTypeInterface $type);
     /**
      * Sets the initial data of the form.
      *
-     * @param array $data The data of the form in application format.
+     * @param mixed $data The data of the form in application format.
      *
      * @return self The configuration object.
      */