Merge branch 'issue#478633-fe' into 'master'

feat: Work Items list view - show discussion count in FE

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/179934



Merged-by: Deepika Guliani <dguliani@gitlab.com>
Approved-by: Fernanda Toledo <ftoledo@gitlab.com>
Approved-by: Nick Brandt <nbrandt@gitlab.com>
Approved-by: Deepika Guliani <dguliani@gitlab.com>
Reviewed-by: Fernanda Toledo <ftoledo@gitlab.com>
Co-authored-by: Vedant Jain <vedantjainben10@gmail.com>