This fix is done by partially replacing the existing pre JavaScript
code with gitlab-ui's Breadcrumb component. A small part of the fix
is a visual-only, transitional workaround, which can be removed in
MR 48115.

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/48115Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>