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/feature_reindex.py

@@ -19,7 +19,7 @@ class ReindexTest(BitcoinTestFramework):
         self.num_nodes = 1
 
     def reindex(self, justchainstate=False):
-        self.nodes[0].generatetoaddress(3, self.nodes[0].get_deterministic_priv_key().address)
+        self.generatetoaddress(self.nodes[0], 3, self.nodes[0].get_deterministic_priv_key().address)
         blockcount = self.nodes[0].getblockcount()
         self.stop_nodes()
         extra_args = [["-reindex-chainstate" if justchainstate else "-reindex"]]