[web/application] remove `path` argument from CubicwebPublisher methods Path can actually be accessed from `req` object. This allows to avoid duplicating this information. This cset prepares the next ones that aim at adding the language as a prefix of the relative path.

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