[breadcrumbs] Small breadcrumb components refactoring * use `open_breadcrumbs` and `close_breadcrumbs` methods where applicable in the BreadCrumbEntityVComponent hierarchy * include the first separator related code in `open_breadcrumbs` to avoid code duplication Closes #3223911.

addressbook
basket
blog
book
calendar
comment
company
email
file
folder
i18ncontent
keyword
link
mailinglist
person
tag
timeseries
vcsfile