Merge branch 'kassio/add-graphql-connection-between-current-user-and-workitems' into 'master'

Enable users to fetch all WorkItems they have access through GraphQL

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/177484



Merged-by: Nicolas Dular <ndular@gitlab.com>
Approved-by: Amr Taha <ataha@gitlab.com>
Approved-by: Nicolas Dular <ndular@gitlab.com>
Reviewed-by: Nicolas Dular <ndular@gitlab.com>
Reviewed-by: Amr Taha <ataha@gitlab.com>
Co-authored-by: Matt D'Angelo <mdangelo@gitlab.com>
Co-authored-by: Kassio Borges <kassioborgesm@gmail.com>