[3.4] Update deps, allow Python 3.9, drop Fedora 32 (#5121) (#5296)

* Update deps + allow Python 3.9

* Add in updates from Jack's branch

* Fix multiple target for cross-reference warnings

* Update a few more Python 3.8 occurrences

* Bump further

* Don't install tox in CodeQL environment

* Bump Python version in docs to 3.9.7

* more bumps

* Add missing pin

* Stop using the deprecated distro.linux_distribution()

* Suppress deprecation warning

* Fix OpenSUSE Leap instructions

* Drop Fedora 32

* Add Python 3.10-dev to CI

* meh

(cherry picked from commit 3254698c78)

Co-authored-by: palmtree5 <3577255+palmtree5@users.noreply.github.com>
Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

Co-authored-by: palmtree5 <3577255+palmtree5@users.noreply.github.com>
Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

docs/changelog_3_4_0.rst

@@ -1053,7 +1053,7 @@ Core Bot
 
 - Added data request API (:issue:`4045`,  :issue:`4169`)
 
-    - New special methods added to `commands.Cog`: `red_get_data_for_user()` (documented provisionally), `red_delete_data_for_user()`
+    - New special methods added to `redbot.core.commands.Cog`: `red_get_data_for_user()` (documented provisionally), `red_delete_data_for_user()`
     - New special module level variable added: ``__red_end_user_data_statement__``
     - These methods and variables should be added by all cogs according to their documentation; see `recommendations-for-cog-creators` for more information
     - New ``info.json`` key added: ``end_user_data_statement``; see `Info.json format documentation <info-json-format>` for more information