Auto merge of #136864 - Kobzol:citool, r=marcoieni

Rewrite the `ci.py` script in Rust

It would seem that I would learn by now that any script written in Python will become unmaintainable sooner or later, but alas..

r? `@marcoieni`

try-job: aarch64-gnu
try-job: dist-x86_64-linux-alt
try-job: x86_64-msvc-ext2

Fixes: rust-lang/rust#137013

Author: bors