Make a test farm tests package (#8821)

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

tools/pinning/pyproject.toml

@@ -32,9 +32,18 @@ certbot-nginx = {path = "../../certbot-nginx", extras = ["docs"]}
 certbot-apache = {path = "../../certbot-apache", extras = ["dev"]}
 certbot = {path = "../../certbot", extras = ["dev", "docs"]}
 acme = {path = "../../acme", extras = ["dev", "docs"]}
+letstest = {path = "../../letstest"}
 windows-installer = {path = "../../windows-installer"}
 
 # Extra dependencies
+# awscli is just listed here as a performance optimization. As of writing this,
+# there are some conflicts in shared dependencies between it and other packages
+# we depend on. To try and resolve them, poetry searches through older versions
+# of awscli to see if that resolves the conflict, but there are over 1000
+# versions of awscli on PyPI so this process takes too long. Providing a high
+# minimum version here prevents poetry from searching this path and it fairly
+# quickly resolves the dependency conflict in another way.
+awscli = ">=1.19.62"
 # As of writing this, cython is a build dependency of pyyaml. Since there
 # doesn't appear to be a good way to automatically track down and pin build
 # dependencies in Python (see