[2.x] ci(core): overhaul reusable backend workflow#4693

DavideIadeluca wants to merge 8 commits into

flarum:2.xflarum/framework:2.xfrom

glowingblue:di/reusable-backend-workflows-overhaulglowingblue/flarum-framework-2.x:di/reusable-backend-workflows-overhaulCopy head branch name to clipboard