test: add feature_coinstatsindex.py --descriptors to test_runner.py

Author: theStack

test/functional/test_runner.py

@@ -304,7 +304,8 @@
     'feature_txindex_compatibility.py',
     'feature_logging.py',
     'feature_anchors.py',
-    'feature_coinstatsindex.py',
+    'feature_coinstatsindex.py --legacy-wallet',
+    'feature_coinstatsindex.py --descriptors',
     'wallet_orphanedreward.py',
     'p2p_node_network_limited.py',
     'p2p_permissions.py',