les, signer, light: replace noarg fmt.Errorf with errors.New (#27336)

Signed-off-by: jsvisa <delweng@gmail.com>

light/trie_test.go

@@ -19,6 +19,7 @@ package light
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"math/big"
 	"testing"
@@ -78,9 +79,9 @@ func diffTries(t1, t2 state.Trie) error {
 	case i2.Err != nil:
 		return fmt.Errorf("light trie iterator error: %v", i2.Err)
 	case i1.Next():
-		return fmt.Errorf("full trie iterator has more k/v pairs")
+		return errors.New("full trie iterator has more k/v pairs")
 	case i2.Next():
-		return fmt.Errorf("light trie iterator has more k/v pairs")
+		return errors.New("light trie iterator has more k/v pairs")
 	}
 	return nil
 }