Merge branch '465965-append-correct-iid-in-url-of-3rd-child-in-wi-child-widget' into 'master'

Append correct iid in URL after 3rd child in child widget

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/156767



Merged-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Approved-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Reviewed-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Co-authored-by: Rajan Mistry <rmistry@gitlab.com>