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_blocksdir.py

@@ -29,7 +29,7 @@ class BlocksdirTest(BitcoinTestFramework):
         self.log.info("Starting with existing blocksdir ...")
         self.start_node(0, [f"-blocksdir={blocksdir_path}"])
         self.log.info("mining blocks..")
-        self.nodes[0].generatetoaddress(10, self.nodes[0].get_deterministic_priv_key().address)
+        self.generatetoaddress(self.nodes[0], 10, self.nodes[0].get_deterministic_priv_key().address)
         assert os.path.isfile(os.path.join(blocksdir_path, self.chain, "blocks", "blk00000.dat"))
         assert os.path.isdir(os.path.join(self.nodes[0].datadir, self.chain, "blocks", "index"))