Configure per-runner timeout for shared-runners-manager-X on GitLab.com
As it's described in https://gitlab.com/gitlab-com/infrastructure/issues/4010#note_69372298, we should use our new per-runner job timeout feature and set the value for shared-runners-manager-X on GitLab.com.
Copying important part from the linked issue:
After a discussion we've decided that 3h timeout for Shared Runners would be a good compromise. It's 3 times more than most of currently active projects are using and still feels to be reasonable.
To apply this we should:
- choose the deadline,
find which projects will be affected when we'll set the 3h timeout,
notify owners of such projects, specifying when we'll update the timeout,
- find affected projects and notify owners before 2018-04-30: #4092
apply the 3h timeout after 2018-05-08: