vfs: only run TestRWCacheRename on remotes which can rename

This fixes the 1fichier integration tests.

vfs/read_write_test.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/pkg/errors"
 	"github.com/rclone/rclone/fs"
+	"github.com/rclone/rclone/fs/operations"
 	"github.com/rclone/rclone/fstest"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -702,6 +703,10 @@ func TestRWCacheRename(t *testing.T) {
 	r := fstest.NewRun(t)
 	defer r.Finalise()
 
+	if !operations.CanServerSideMove(r.Fremote) {
+		t.Skip("skip as can't rename files")
+	}
+
 	opt := DefaultOpt
 	opt.CacheMode = CacheModeFull
 	vfs := New(r.Fremote, &opt)