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/example_test.py

@@ -25,7 +25,6 @@ from test_framework.p2p import (
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
-    connect_nodes,
 )
 
 # P2PInterface is a class containing callbacks to be executed when a P2P
@@ -115,7 +114,7 @@ class ExampleTest(BitcoinTestFramework):
         # In this test, we're not connecting node2 to node0 or node1. Calls to
         # sync_all() should not include node2, since we're not expecting it to
         # sync.
-        connect_nodes(self.nodes[0], 1)
+        self.connect_nodes(0, 1)
         self.sync_all(self.nodes[0:2])
 
     # Use setup_nodes() to customize the node start behaviour (for example if
@@ -183,7 +182,7 @@ class ExampleTest(BitcoinTestFramework):
         self.nodes[1].waitforblockheight(11)
 
         self.log.info("Connect node2 and node1")
-        connect_nodes(self.nodes[1], 2)
+        self.connect_nodes(1, 2)
 
         self.log.info("Wait for node2 to receive all the blocks from node1")
         self.sync_all()