Apply PHPCS auto-fixes

Boris Doesborgrequested to merge
issue/private_content-3563323:3563323-make-code-pass into 8.x-2.x
  • Convert array() to short [] syntax
  • Fix visibility declarations
  • Add missing blank lines
  • Fix line endings
  • Remove unused use statements
  • Add trailing commas in multiline arrays

Co-Authored-By: Claude Opus 4.5 noreply@anthropic.com

Closes #3563323

Merge request reports