test: add functional test for complex reorgs

test/functional/test_runner.py

@@ -320,6 +320,7 @@ BASE_SCRIPTS = [
     'feature_includeconf.py',
     'feature_addrman.py',
     'feature_asmap.py',
+    'feature_chain_tiebreaks.py',
     'feature_fastprune.py',
     'feature_framework_miniwallet.py',
     'mempool_unbroadcast.py',