les, light: improve txstatus retrieval (#22349)

Transaction unindexing will be enabled by default as of 1.10, which causes tx status retrieval will be broken without this PR. 

This PR introduces a retry mechanism in TxStatus retrieval.

les/pruner_test.go

@@ -28,19 +28,26 @@ import (
 )
 
 func TestLightPruner(t *testing.T) {
-	config := light.TestClientIndexerConfig
-
-	waitIndexers := func(cIndexer, bIndexer, btIndexer *core.ChainIndexer) {
-		for {
-			cs, _, _ := cIndexer.Sections()
-			bts, _, _ := btIndexer.Sections()
-			if cs >= 3 && bts >= 3 {
-				break
+	var (
+		waitIndexers = func(cIndexer, bIndexer, btIndexer *core.ChainIndexer) {
+			for {
+				cs, _, _ := cIndexer.Sections()
+				bts, _, _ := btIndexer.Sections()
+				if cs >= 3 && bts >= 3 {
+					break
+				}
+				time.Sleep(10 * time.Millisecond)
 			}
-			time.Sleep(10 * time.Millisecond)
 		}
-	}
-	server, client, tearDown := newClientServerEnv(t, int(3*config.ChtSize+config.ChtConfirms), 2, waitIndexers, nil, 0, false, true, false)
+		config    = light.TestClientIndexerConfig
+		netconfig = testnetConfig{
+			blocks:   int(3*config.ChtSize + config.ChtConfirms),
+			protocol: 3,
+			indexFn:  waitIndexers,
+			connect:  true,
+		}
+	)
+	server, client, tearDown := newClientServerEnv(t, netconfig)
 	defer tearDown()
 
 	// checkDB iterates the chain with given prefix, resolves the block number