nzAutoGenerate on breadcrumbs fails with empty string paths

[patricknazar]

Reproduction link

https://stackblitz.com/edit/ng-zorro-antd-auto-breadcrumbs

Steps to reproduce

Hover over the breadcrumb link, the link has double slashes // in it because of the way this code in breadcrumb component works.

What is expected?

It should class multiple empty paths as just one path. Because of this, the links simply are wrong and don't work i.e. https://child instead of https://ng-zorro-antd-auto-breadcrumbs.stackblitz.io/child

What is actually happening?

It's joining empty paths with / and so if we have multiple we end up with // or more depending on how many levels deep we have

Environment	Info
ng-zorro-antd	9.3.0
Browser	Chrome

[patricknazar]

Yeah ok so this is a duplicate of #5613 I did see this one but I thought it was different. I'll let someone else close this.