Re: [libvirt PATCH 0/4] ci: reduce number of jobs in the pipeline

Come June 1st (aka very very soon) GitLab will reduce the CI minutes quota available from 2000 to 400 for public projects. The wallclock minutes for CI are the quota divided by a cost factor currently 0.008. IOW, after June 1st our allowance reduces from 250,000 wallclock minutes to 50,000. While I had intended that we join the OSS program, I'm unhappy with the financial liability the T&Cs require us to agree to for tha Usage stats show we're currently consuming 70-80,000 minutes a month, so we need to cut our usage by at least 30%. The main libvirt project is responsible for the vast majority of usage, so is the biggest quick win, but we need to economise across all our repos. With this series, we increase the number of jobs in the pipeline from 82 to 100, but we mark a great many of them as manual jobs, so they never run unless a user explicitly triggers them. So we have only 54 jobs executing instead of the original 82. The remaining 46 jobs are optional. This is a decent win in usage, but we probably need to cut a little more later to give us breathing space