Backport #27485 by @techknowlogick
I'm temporarily unable to properly evaluate actuated runners, and so I'm
switching back to hosted runners until I am able to focus on that again.
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Co-authored-by: techknowlogick <techknowlogick@gitea.com>
Co-authored-by: silverwind <me@silverwind.io>
* Rootless/ful docker images build separately
* Vendor go modules outside docker to speed up the build
Thanks to Alex Ellis for these suggestions (and actuated runner build
time)