Fix python-augeas failure on Windows (v2) (#8951)

This PR is a new approach for fixing #8732 based on the discussions occurred in the first PR #8877.

This PR upgrades python-augeas to the latest version, and avoids tests failure of Windows because of this upgrade. To do so it leverages the [tox multi-platform feature](https://tox.readthedocs.io/en/latest/example/platform.html) and modifications to `tools/venv.py` in order to not install and not test `certbot-apache` on Windows.

* Unpin python-augeas and upgrade current pinnings

* Do not install certbot-apache in Windows dev environments

* Introduce tox specific win packages + remove certbot compatibility on windows

* Add libaugeas to sphinx build

* Redefine lint and mypy targets

* Keep the lint and mypy environments

tools/venv.py

@@ -49,6 +49,8 @@ REQUIREMENTS = [
 
 if sys.platform == 'win32':
     REQUIREMENTS.append('-e windows-installer')
+    REQUIREMENTS.remove('-e certbot-apache')
+    REQUIREMENTS.remove('-e certbot-compatibility-test')
 
 VERSION_PATTERN = re.compile(r'^(\d+)\.(\d+).*$')