[8.5] Add `locale_is_right_to_left`#527

alexander-schranz wants to merge 3 commits intosymfony:1.xsymfony/polyfill:1.xfrom

alexander-schranz:feature/locale_is_right_to_lefalexander-schranz/polyfill:feature/locale_is_right_to_lefCopy head branch name to clipboard