itest: add peer bootstrapping itest

Test the automatic peer bootstrapping logic via an itest.

itest/list_on_test.go

@@ -707,6 +707,10 @@ var allTestCases = []*lntest.TestCase{
 		Name:     "partially specified route blinded invoice",
 		TestFunc: testPartiallySpecifiedBlindedPath,
 	},
+	{
+		Name:     "peer bootstrapping",
+		TestFunc: testPeerBootstrapping,
+	},
 }
 
 // appendPrefixed is used to add a prefix to each test name in the subtests