update gitlab-ci config to build on multiple OS runners
update gitlab-ci config to build on multiple OS runners

Twinklebear/OSPRay,ospray/OSPRay,wilsonCernWq/ospray,ospray/OSPRay,MengjiaoH/ospray,Twinklebear/OSPRay,MengjiaoH/ospray,wilsonCernWq/ospray,MengjiaoH/ospray,Twinklebear/OSPRay,Twinklebear/OSPRay,ospray/OSPRay,MengjiaoH/ospray,MengjiaoH/ospray,ospray/OSPRay,wilsonCernWq/ospray