Add end-to-end tests for Share groups with Groups feature

Add end-to-end tests for Share groups with Groups feature as described in the test plan: gitlab-org/gitlab#23860 (closed)

Related MR: gitlab-org/gitlab#18328 (closed) Also see: https://gitlab.com/gitlab-org/gitlab/issues/202520

changed milestone to %12.10

mentioned in issue gitlab-com/www-gitlab-com#6555 (closed)

added Quality Qualitytest-gap devopsmanage groupauthentication and authorization [DEPRECATED] labels

changed the description

added to epic gitlab-org&661

added [deprecated] Accepting merge requests label

Setting gitlab-org/gitlab13440331 based on gitlab-org/gitlab10046105.

added 1 deleted label

marked this issue as related to gitlab-com/www-gitlab-com#6555 (closed)

added missed:12.10 label

added missed:13.0 label

added missed:13.1 label

changed the description

assigned to @sliaquat

removed [deprecated] Accepting merge requests label

changed milestone to %13.3

moved from gitlab-org/gitlab#205259 (moved)

mentioned in merge request gitlab-org/gitlab!37178 (merged)

changed due date to July 31, 2020

added workflowin dev label

mentioned in issue gitlab-com/www-gitlab-com#7246 (closed)

mentioned in commit gitlab-org/gitlab@b4a3a1ed

closed with merge request gitlab-org/gitlab!37178 (merged)