[Windows|Linux] Forbid os.stat and os.fstat (#7325)

Fixes #7212

This PR forbid os.stat and os.fstat, and fix or provide alternatives to avoid its usage in certbot outside of certbot.compat.filesystem.

* Reimplement private key mode propagation

* Remove other os.stat

* Remove last call of os.stat in certbot package

* Forbid stat and fstat

* Implement mode comparison checks

* Add unit tests

* Update certbot/compat/filesystem.py

Co-Authored-By: Brad Warren <bmw@users.noreply.github.com>

* Update certbot/compat/filesystem.py

Co-Authored-By: Brad Warren <bmw@users.noreply.github.com>

* Handle case where multiple ace concerns a given SID in has_min_permissions

* Add a new test scenario

* Add a simple test for has_same_ownership

* Fix name function

* Add a comment explaining an ACE structure

* Move a test in its dedicated class

* Improve a message error

* Calculate has_min_permission result using effective permission rights to be more generic.

* Change an exception message

* Add comments, avoid to skip a test.

* Update certbot/compat/filesystem.py

Co-Authored-By: Brad Warren <bmw@users.noreply.github.com>

certbot-dns-linode/local-oldest-requirements.txt

@@ -1,4 +1,4 @@
 # Remember to update setup.py to match the package versions below.
 acme[dev]==0.31.0
-certbot[dev]==0.34.0
+-e .[dev]
 dns-lexicon==2.2.3

certbot-dns-linode/setup.py

@@ -6,7 +6,7 @@ version = '0.39.0.dev0'
 # Please update tox.ini when modifying dependency version requirements
 install_requires = [
     'acme>=0.31.0',
-    'certbot>=0.34.0',
+    'certbot>=0.39.0.dev0',
     'dns-lexicon>=2.2.3',
     'mock',
     'setuptools',