Re: [PATCH v2 0/3] Fix broken CI on newer github-actions runner image

> From: Jiang Xin <zhiyou.jx@alibaba-inc.com>
>
> GitHub CI runner image "ubuntu-latest" will upgrade to "ubuntu-22.04"
> soon, and the CI runner image of my private host repository has
> already been upgraded.
>
> Our CI will break on new runner image because there is not "gcc-8"
> package in ubuntu-22.04. See log of CI#2:
>
>  * https://github.com/jiangxin/git-ci-test/actions/runs/3537628107/jobs/5937769957
>
> This issue is fixed in patch 1/3 by downgrade the version of the runner
> image for jobs which need "gcc-8". But there are still some CI errors.
> This is because p4/p4d version 16.2 cannot run on ubuntu-22.04. See this
> log of CI#3:
>
>  * https://github.com/jiangxin/git-ci-test/actions/runs/3537650146/jobs/5937813922
>
> This issue is fixed in patch 2/3 by upgrade p4 and p4d. But all p4
> related test cases failed becasue python was missing on ubuntu-22.04.
> See the log of CI#4:
>
>  * https://github.com/jiangxin/git-ci-test/actions/runs/3537695959/jobs/5937929695
>
> This issue is fixed in patch 3/3 by install python2/python3 on ubutnu.
>
> If install p4 version 22.2, will break several p4 related test cases,
> see the log of CI#7:
>
>  * https://github.com/jiangxin/git-ci-test/actions/runs/3538795233/jobs/5939989823
>
> So we choose p4 21.2, and the final successful log of CI#8 is below:
>
>  * https://github.com/jiangxin/git-ci-test/actions/runs/3538946849