This diff re-enables `E2E/miniooni.bash`. To make it working properly, we
needed to figure out which were the right cloudfronts to use.
I looked into the configuration and determined that both cloudfronts
should be used because they basically map to the same host.
I also determined it was backwards to test a mixture of prod and testing
APIs, and probably also flaky. So, I choose to only test the prod.
Additionally, I added support for testing all supported tunnels.
Closes https://github.com/ooni/probe/issues/2336
* feat: add end-to-end testing to this repository
Part of https://github.com/ooni/probe-engine/issues/1181
Motivation: we want to run this check from the repository where
we work the most, such that it's unlikely it pauses due to inactivity,
as it may happen for less frequently touched upon repositories.
Code adapted from https://github.com/ooni/e2etesting/
* fix: correct name for main branch
