…el attributes declared in label_attr (AngelFQC)This PR was submitted for the 4.2 branch but it was merged into the 4.3-dev branch instead (closes#31220).Discussion----------[TwigBridge] bootstrap4 file_widget: allow setting label attributes declared in label_attr| Q             | A| ------------- | ---| Branch?       | 4.2 <!-- see below -->| Bug fix?      | yes| New feature?  | no <!-- don't forget to update src/**/CHANGELOG.md files -->| BC breaks?    | no     <!-- seehttps://symfony.com/bc -->| Deprecations? | no <!-- don't forget to update UPGRADE-*.md and src/**/CHANGELOG.md files -->| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->| Fixed tickets | ...   <!-- #-prefixed issue number(s), if any -->| License       | MIT| Doc PR        | ... <!-- required for new features -->> Bootstrap provides a way to translate the “Browse” text in HTML with the data-browse attribute which can be added to the custom input label.https://getbootstrap.com/docs/4.3/components/forms/#translating-or-customizing-the-strings-with-htmlBut currently the attributes declared in label_attr aren't being added.Previously I sent this same change to the master branch (PR#31102), but I think I should have sent it to branch 4.2Commits-------9c76b29 [TwigBridge] bootstrap4 file_widget: allow setting label attributes declared in label_attr