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/test-shell.md

@@ -94,7 +94,7 @@ rewards to a wallet address owned by the mining node.
 
 ```
 >>> address = test.nodes[0].getnewaddress()
->>> test.nodes[0].generatetoaddress(101, address)
+>>> test.self.generatetoaddress(nodes[0], 101, address)
 ['2b98dd0044aae6f1cca7f88a0acf366a4bfe053c7f7b00da3c0d115f03d67efb', ...
 ```
 Since the two nodes are both initialized by default to establish an outbound