test: Add functional test for Coinstats index

test/functional/test_runner.py

@@ -281,6 +281,7 @@ BASE_SCRIPTS = [
     'rpc_scantxoutset.py',
     'feature_logging.py',
     'feature_anchors.py',
+    'feature_coinstatsindex.py',
     'p2p_node_network_limited.py',
     'p2p_permissions.py',
     'feature_blocksdir.py',