Cleanup crowdin workflow

[toy]

Improvements to crowdin workflow:

• Use fork of crowdin action to create files with runner owner instead of changing owner afterwards (feat: add user input to not create downloaded files with root owner crowdin/github-action#309) => switch user in crowdin action instead of changing owner after run #22554
• Rewrite downloaded yamls using script/i18n/rewrite_crowdin_yml_files (script to rewrite yaml files using psych #22533 should be merged first, as script should be both in dev and latest release branches). This should simplify the logic in [#72881] Handle generated Crowdin conflicts in release-to-dev merges #22249
• Cleanup script/i18n/fix_crowdin_pt_language_root_key a bit

[Copilot]

Pull request overview

Updates the Crowdin translation sync workflow to avoid file ownership fixes, normalize downloaded translation YAMLs, and simplify the Portuguese root-key correction script.

Changes:

• Switch Crowdin GitHub Action to an OPF fork and remove the post-download chown step.
• Add a workflow step to rewrite downloaded Crowdin YAML files via a Ruby-based rewriter script.
• Refactor fix_crowdin_pt_language_root_key to centralize GNU/BSD sed -i handling.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
script/i18n/fix_crowdin_pt_language_root_key	Refactors sed -i handling into a helper and runs the two substitutions via the helper.
.github/workflows/crowdin.yml	Switches to a forked Crowdin action, removes ownership-fix step, and adds a YAML rewrite step after download.