fix: remove auto-close GetObjectReader (#12009)

locks can get relinquished when Read() sees io.EOF
leading to prematurely closing of the readers

concurrent writes on the same object can have
undesired consequences here when these locks
are relinquished.

cmd/bucket-lifecycle.go

@@ -530,7 +530,7 @@ type SelectParameters struct {
 
 // IsEmpty returns true if no select parameters set
 func (sp *SelectParameters) IsEmpty() bool {
-	return sp == nil || sp.S3Select == s3select.S3Select{}
+	return sp == nil
 }
 
 var (