GitHub CI setup-with-retry speedup - alternative approach, entirely removing Docker #36071
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Fixes #30706 , however unlike #35873 follows a different approach of removing Docker (which is preferred according to my talk with @adeebshihadeh ). Both implementations have extremely similar performance, since they work essentially the same (the only remaining limiting factors being network, disk I/O speed and the CPU for Zstandard decompression). The only practical difference between them is the lack of a ~400 line docker pull reimplementation in this approach.
Still a draft for now, as (probably because of the weirdness of the GitHub CI Ubuntu image) we're running into some weird Python problem. That's in contrast to the Docker proposed approach, which is already fully working.