workflows: use Homebrew/actions/download-artifact (#19895)
workflows: use Homebrew/actions/download-artifact (#19895)

* workflows: use Homebrew/actions/download-artifact
* workflows: determine associated pull request

Co-authored-by: Dawid Dziurla <c4a7db180859322ef5630a1dfc2805b5bc97fc25@gmail.com>
Linuxbrew/homebrew-core,rwhogg/homebrew-core,Linuxbrew/homebrew-core,rwhogg/homebrew-core,maxim-belkin/homebrew-core,maxim-belkin/homebrew-core