* letstest: -ubuntu18.04 +centos9stream +debian11
* letstest: username for centos 9 stream is ec2-user
This is mentioned on https://centos.org/download/aws-images/
* ensure mod_ssl is installed
in centos 9 stream, apache has to be restarted after mod_ssl is
installed, or the snakeoil certificates will not be present and
apache won't start.
this also removes nghttp2 being installed as the relevant bug
is long fixed.
The reason I want to do this is many of the targets of `test_sdists.sh` use Python 3.6 which [has reached its EOL](https://www.python.org/dev/peps/pep-0494/#lifespan). We could instead just stop running the test on these systems or install a newer version of Python 3 outside of OS packaging, but instead I decided to look into why we have these tests to begin with.
I introduced these tests many years ago in https://github.com/certbot/certbot/pull/4089 as a fix for https://github.com/certbot/certbot/issues/4044. Essentially the problem was the way packagers ran tests and the way we ran tests were slightly different. This difference could cause test failures when distros tried to run tests on our packages.
Since I did this, [we've switched to telling packagers to run tests using `pytest` like we do](https://github.com/certbot/certbot/blob/5e76669c5026732d1440e39e93b58220ef7bd354/certbot/docs/packaging.rst#notes-for-package-maintainers) and we've greatly reduced our reliance on OS packaging through things like `snap`.
Because of this, I think we should stop running this test, reducing our reliance on the heavy "test farm tests", and simplifying our CI pipeline. I think future problems here is quite unlikely and even if we have them, it should only affect tests on our non-primary distribution mechanisms which I think is a very minor concern.
When reviewing this PR, it's probably worth noting that I just replaced `targets.yaml` with the contents of `apache2_targets.yaml` since the Apache 2 tests are the only runs we're running with this change.
Fixes https://github.com/certbot/certbot/issues/8781.
This PR makes our test farm tests into a normal package so it and its dependencies can be tracked and installed like our other packages.
Other noteworthy changes in this PR:
* Rather than continuing to place logs in your CWD, they're placed in a temporary directory that is printed to the terminal.
* `tests/letstest/auto_targets.yaml` was deleted rather than renamed because the file is no longer used.
* make a letstest package
* remove deleted deps
* fix letstest install
* add __init__.py
* call main
* Explicitly mention activating venv
* rerename file
* fix version.py path
* clarify "this"
* Use >= instead of caret requirement
