nixos/tests/acme: don't restrict to x86_64

This was added in aade4e577bbb27f044217c51a006ab6ba544ebb5, but the
implementation of the ACME module has been entirely rewritten since
then, and the test seems to run fine on AArch64.

Emily 352e30df 6285d5ea

Changed files
+1 -1
nixos
+1 -1
nixos/tests/all-tests.nix
···
in
{
_3proxy = handleTest ./3proxy.nix {};
-
acme = handleTestOn ["x86_64-linux"] ./acme.nix {};
+
acme = handleTest ./acme.nix {};
atd = handleTest ./atd.nix {};
automysqlbackup = handleTest ./automysqlbackup.nix {};
avahi = handleTest ./avahi.nix {};