Retire Fedora 31 for 32

We have Fedora 32 nodes now, retire the Fedora 31 testing and replace
with 32.

Docker isn't supported on Fedora 32.  There's a problem with cgroups
v2 and you can read all about it at [1].  Drop the install test.

Haskell upstream has dropped F32 from the COPR repo as it is now
packaged; a new package with the correct dependencies has been pushed
but isn't available yet (see the inline github issue), so workaround
the missing package.

[1] https://github.com/docker/for-linux/issues/955

Change-Id: I025613bee8c0a8513afa90331431d2c18b616464

tools/update-test-platforms.py

@@ -32,7 +32,7 @@ PLATFORMS = [
     'centos-7',
     'centos-8',
     'debian-stretch',
-    'fedora-31',
+    'fedora-32',
     'gentoo-17-0-systemd',
     'opensuse-15',
     'opensuse-tumbleweed',