minor #28916 [Form] Fix @method annotation (ro0NL)
minor #28916 [Form] Fix @method annotation (ro0NL)

This PR was squashed before being merged into the 4.2-dev branch (closes #28916).

Discussion
----------

[Form] Fix @method annotation

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | no
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | #...   <!-- #-prefixed issue number(s), if any -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

Same as #28915 for 4.2 (these are the only occurrences for interfaces)

Actually provides a use case for https://github.com/symfony/symfony/pull/28902#issuecomment-430904459 :tada:

Commits
-------

13f0db718e [Form] Fix @method annotation

symfony/Form