Group issues search is slow when filtering by label
In https://gitlab.com/gitlab-com/infrastructure/issues/2216 we reduced the statement timeout.
This caused https://gitlab.com/groups/gitlab-org/-/issues?scope=all&utf8=%E2%9C%93&state=opened&label_name[]=SP1 to start hitting the statement timeout. It doesn't seem like it's close now, but we should keep an eye on this page.
https://gitlab.com/gitlab-com/infrastructure/issues/3291 will drop the statement timeout back on 1 Feb 2018, so we need to make sure this works.