fix(MM2-1953): add vendor promotions rule attribute options middleware and update related validation logic#532

tomaszburas wants to merge 2 commits intodevelopmentmercurjs/mercur:developmentfrom

MM2-1953-b-2-c-vendor-panel-no-product-to-select-in-condition-on-promotion-viewmercurjs/mercur:MM2-1953-b-2-c-vendor-panel-no-product-to-select-in-condition-on-promotion-viewCopy head branch name to clipboard