tests/fuzzers: update fuzzers to be based on go-native fuzzing (#28352)

This change modifies the fuzzers to use the native golang fuzzing framework instead of go-fuzz

tests/fuzzers/les/les-fuzzer.go

@@ -279,7 +279,7 @@ func (f *fuzzer) doFuzz(msgCode uint64, packet interface{}) {
 	fn(f, peer, func() bool { return true })
 }
 
-func Fuzz(input []byte) int {
+func fuzz(input []byte) int {
 	// We expect some large inputs
 	if len(input) < 100 {
 		return -1

tests/fuzzers/les/les_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020 The go-ethereum Authors
+// Copyright 2023 The go-ethereum Authors
 // This file is part of the go-ethereum library.
 //
 // The go-ethereum library is free software: you can redistribute it and/or modify
@@ -14,27 +14,12 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
-package main
+package les
 
-import (
-	"fmt"
-	"os"
+import "testing"
 
-	"github.com/ethereum/go-ethereum/tests/fuzzers/les"
-)
-
-func main() {
-	if len(os.Args) != 2 {
-		fmt.Fprintf(os.Stderr, "Usage: debug <file>\n")
-		fmt.Fprintf(os.Stderr, "Example\n")
-		fmt.Fprintf(os.Stderr, "	$ debug ../crashers/4bbef6857c733a87ecf6fd8b9e7238f65eb9862a\n")
-		os.Exit(1)
-	}
-	crasher := os.Args[1]
-	data, err := os.ReadFile(crasher)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "error loading crasher %v: %v", crasher, err)
-		os.Exit(1)
-	}
-	les.Fuzz(data)
+func Fuzz(f *testing.F) {
+	f.Fuzz(func(t *testing.T, data []byte) {
+		fuzz(data)
+	})
 }