scripted-diff: test: Replace uses of (dis)?connect_nodes global

-BEGIN VERIFY SCRIPT-

 # max-depth=0 excludes test/functional/test_framework/...
 FILES=$(git grep -l --max-depth 0 "connect_nodes" test/functional)

 # Replace (dis)?connect_nodes(self.nodes[a], b) with self.(dis)?connect_nodes(a, b)
 sed -i 's/\b\(dis\)\?connect_nodes(self\.nodes\[\(.*\)\]/self.\1connect_nodes(\2/g' $FILES

 # Remove imports in the middle of a line
 sed -i 's/\(dis\)\?connect_nodes, //g' $FILES
 sed -i 's/, \(dis\)\?connect_nodes//g' $FILES

 # Remove imports on a line by themselves
 sed -i '/^\s*\(dis\)\?connect_nodes,\?$/d' $FILES
 sed -i '/^from test_framework\.util import connect_nodes$/d' $FILES

-END VERIFY SCRIPT-

Co-authored-by: Elliott Jin <elliott.jin@gmail.com>

test/functional/wallet_avoidreuse.py

@@ -9,7 +9,6 @@ from test_framework.util import (
     assert_approx,
     assert_equal,
     assert_raises_rpc_error,
-    connect_nodes,
 )
 
 def reset_balance(node, discardaddr):
@@ -111,7 +110,7 @@ class AvoidReuseTest(BitcoinTestFramework):
         assert_equal(self.nodes[1].getwalletinfo()["avoid_reuse"], True)
 
         self.restart_node(1)
-        connect_nodes(self.nodes[0], 1)
+        self.connect_nodes(0, 1)
 
         # Flags should still be node1.avoid_reuse=false, node2.avoid_reuse=true
         assert_equal(self.nodes[0].getwalletinfo()["avoid_reuse"], False)