test: add functional test for anchors.dat

test/functional/test_runner.py

@@ -279,6 +279,7 @@ BASE_SCRIPTS = [
     'p2p_ping.py',
     'rpc_scantxoutset.py',
     'feature_logging.py',
+    'feature_anchors.py',
     'p2p_node_network_limited.py',
     'p2p_permissions.py',
     'feature_blocksdir.py',