Simplify getBreadcrumbs (#26015)

* fix getBreadcrumbs

* don't go too deep

* remove commented out code

components/page-header/Breadcrumbs.tsx

@@ -6,7 +6,6 @@ import styles from './Breadcrumbs.module.scss'
 
 export type BreadcrumbT = {
   title: string
-  documentType?: string
   href?: string
 }