tests/trustedcoin: remove from CI, disable temporarily

- Don't spin up a CI node for the minor `trustedcoin` test.
- Add the test to `run-tests.sh`, but disable it because it
  occasionally fails.

.cirrus.yml

@@ -27,7 +27,6 @@ task:
           - scenario: default
           - scenario: netns
           - scenario: netnsRegtest
-          - scenario: trustedcoin
       # This script is run as root
       build_script:
         - echo "sandbox = true" >> /etc/nix/nix.conf

test/run-tests.sh

@@ -275,6 +275,11 @@ buildable=(
     clightning-replication
     lndPruned
     wireguard-lndconnect
+
+    # TODO-EXTERNAL:
+    # Reenable when this has been fixed:
+    # https://github.com/nbd-wtf/trustedcoin/issues/21
+    # trustedcoin
 )
 buildable() { buildTests buildable "$@"; }