This diff includes a rule to recover from the "measurement failed" state that kicks in when we have a chain of successful redirects from the client side leading to a webpage _and_ any URL in the chain uses HTTPS. See https://github.com/ooni/probe/issues/2307.
While there, fix `i/e/w/iox.go` to avoid triggering the `./script/nocopyreadall.bash` script.
While working on https://github.com/ooni/probe/issues/2130, and specifically on the action item related to making sure all workflows are green, I was confronted with the complexity of the QA directory.
There's plenty of cleaning up and simplifying there. The original intent was to A/B test `miniooni` and `measurement_kit` to ensure they were behaving the same. We don't have this need anymore.
Rather, it seems the QA scripts have grown large and flaky, to the point that I am always tempted to ignore them. The underlying censorship engine, jafar, has also not been developed for quite some time.
So, the first step towards improve the QA infrastructure seems to be humble and acknowledge that we cannot realistically maintain these checks using jafar as a backend for so many experiments.
Let us focus on our most important experiment, Web Connectivity, and let us keep QA checks for it.
Additionally, let us simplify and cleanup QA as much as possible, though without introducing radical changes.
The end result is a QA for Web Connectivity that seems reasonable and runs in six minutes.
This work aims to make Linux builds faster to make https://github.com/ooni/probe/issues/2249 more convenient. Since those builds runs inside Docker, the problem to solve here is to save/restore the Go caches notwithstanding Docker. Because Docker runs as root, we need to modify the build a bit to run as a normal user. Otherwise, we will not be able to save the Go cache using actions/cache@v3. (Other approaches such as using `sudo` are possible but running the build as an unprivileged user actually looks cleaner, so I chose to do that.) While there, add a `.editorconfig`.
