scripted-diff: Use generate* from TestFramework

-BEGIN VERIFY SCRIPT-
 sed --regexp-extended -i \
     's/((self\.)?(nodes\[[^]]+\]|[a-z_]*(wallet|node)[0-9a-z_]*))\.(generate(|toaddress|block|todescriptor)(\(|, ))/self.\5\1, /g' \
     $(git grep -l generate ./test | grep -v 'test_framework/' | grep -v 'feature_rbf')
-END VERIFY SCRIPT-

test/functional/rpc_dumptxoutset.py

@@ -23,7 +23,7 @@ class DumptxoutsetTest(BitcoinTestFramework):
         node = self.nodes[0]
         mocktime = node.getblockheader(node.getblockhash(0))['time'] + 1
         node.setmocktime(mocktime)
-        node.generate(COINBASE_MATURITY)
+        self.generate(node, COINBASE_MATURITY)
 
         FILENAME = 'txoutset.dat'
         out = node.dumptxoutset(FILENAME)