Apply go fix ./... (#22037)

internal/data/tree_stream.go

@@ -3,6 +3,7 @@ package data
 import (
 	"context"
 	"runtime"
+	"slices"
 	"sync"
 
 	"github.com/restic/restic/internal/debug"
@@ -158,8 +159,8 @@ func filterTrees(ctx context.Context, repo restic.Loader, trees restic.IDs, load
 
 			debug.Log("input job tree %v", j.ID)
 			// iterate backwards over subtree to compensate backwards traversal order of nextTreeID selection
-			for i := len(j.Subtrees) - 1; i >= 0; i-- {
-				id := j.Subtrees[i]
+			for _, id := range slices.Backward(j.Subtrees) {
+
 				if id.IsNull() {
 					// We do not need to raise this error here, it is
 					// checked when the tree is checked. Just make sure