don't show deleted groups in admin page
don't show deleted groups in admin page

fixes CNVS-23225

test plan
 - see ticket

Change-Id: Ib688992ef51df89b19aacbef0bdd8a4dc0891367
Reviewed-on: https://gerrit.instructure.com/63417
Tested-by: Jenkins
Reviewed-by: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Product-Review: Rob Orton <7e09c9d3e96378bf549fc283fd6e1e5b7014cc33@instructure.com>

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