storj: update storj.io/uplink to v1.12.0

The improved upload logic is active by default in uplink v1.12.0, so the
`testuplink.WithConcurrentSegmentUploadsDefaultConfig(ctx)` is not
required anymore.

See https://github.com/rclone/rclone/pull/7198

backend/storj/fs.go

@@ -24,7 +24,6 @@ import (
 
 	"storj.io/uplink"
 	"storj.io/uplink/edge"
-	"storj.io/uplink/private/testuplink"
 )
 
 const (
@@ -277,8 +276,6 @@ func (f *Fs) connect(ctx context.Context) (project *uplink.Project, err error) {
 		UserAgent: "rclone",
 	}
 
-	ctx = testuplink.WithConcurrentSegmentUploadsDefaultConfig(ctx)
-
 	project, err = cfg.OpenProject(ctx, f.access)
 	if err != nil {
 		return nil, fmt.Errorf("storj: project: %w", err)