Merge branch 'eduardosanz/keyset-pagination-icons' into 'master'

Fix first and last pagination icon sizes

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/175320



Merged-by: Vijay Hawoldar <vhawoldar@gitlab.com>
Approved-by: Vijay Hawoldar <vhawoldar@gitlab.com>
Reviewed-by: Vijay Hawoldar <vhawoldar@gitlab.com>
Reviewed-by: Eduardo Sanz García <esanz-garcia@gitlab.com>
Co-authored-by: Eduardo Sanz García <esanz-garcia@gitlab.com>