minor #31222 [Form] Add Button type back to Form::getClickedButton docblock (Bill Hance)
minor #31222 [Form] Add Button type back to Form::getClickedButton docblock (Bill Hance)

This PR was merged into the 3.4 branch.

Discussion
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[Form] Add Button type back to Form::getClickedButton docblock

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

In commit 56429a6f082c057880e88ca665910b04d26e76d8 the `Button` type was removed from the return doc block.

I suspect this was an oversight because, AFAIK, the [recommended way](https://symfony.com/doc/current/form/multiple_buttons.html) to check the name of a clicked button would require a return type of `Button` or `SubmitButton`.

The effect is that our static analysis checks are failing.
```
Call to an undefined method
Symfony\Component\Form\ClickableInterface::getName().
```

Commits
-------

b71d589071 Added FormInterface to @return Form::getClickedButton docblock

symfony/Form