[Tarantool-patches] [PATCH v1] gitlab-ci: cleanup temporary perf images

[Sergey Bronnikov]

Hi, Oleg!

generally LGTM, but see my question regarding commit message.

On 03:36 Wed 20 May , Oleg Piskunov wrote:
> 
> 
> - add cleanup after perf docker
>   image preparation (perf_bootstrap job).
> - cleanup perf docker images on execution hosts
>   after perf testing (cleanup stage).
>  
> Closes #5003

There is a best practice to explain 'what' and 'why' in a commit message
body. It is unclear why we should cleanup these images and cannot reuse
existed images.

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