tests: replace keystone with llvm-mc firmware build pipeline#57

Jerome Haxhiaj (jeromehaxhiaj-qti) wants to merge 3 commits into

qualcomm:mainqualcomm/qbox:mainfrom

jeromehaxhiaj-qti:retire_keystonejeromehaxhiaj-qti/qbox:retire_keystoneCopy head branch name to clipboard