chore(3p/sources): Bump channels & overlays

* //3p/sources: temporarily switch to nixos-unstable-small, since it
  includes:

  - evans update we are interested in, allowing us to drop our evans
    patches.
  - awscli2 update that unbreaks //users/grfn

* //3p/overlays/tvl:

  - drop evans patches
  - update tdlib to 1.8.11 to make tazjin's emacs happy
  - drop obsolete mullvad workaround

* //users/grfn/keyboard: disable -Werror for array-bounds warnings.
  Seems like a non-trivial job to resolve the warning properly,
  hopefully GCC 12 still generates the same working code as GCC 11 used
  to.

* //users/grfn/system/home: remove yubikey-manager-qt.
  Yubico can't seem to keep that on pace with yubikey-manager. It
  requires a <5 version of the latter which is incompatible with the
  recently released cryptography >= 39.

* //3p/gerrit: update changed FOD hash for the fetch step

Change-Id: I590ab996247e69b0ab5059cd173840ef4ebfe939
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8133
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>

users/grfn/system/home/platforms/linux.nix

@@ -57,7 +57,8 @@ in
     keybase
     openssl
     yubikey-manager
-    yubikey-manager-qt
+    # TODO(grfn): lagging behind yubikey-manager and doesn't support cryptography >= 39
+    # yubikey-manager-qt
 
     # Spotify...etc
     spotify