Use debhelper 13 and standard dh sequence + <nodoc> support (Closes: #1053793, #1053794)

Gioele Barabuccirequested to merge
gioele/grep:dh-nodoc into debian/experimental

CDBS has been deprecated by the upstream authors in 2021 and has been orphaned in 2022, see https://bugs.debian.org/1026085.

The current packaging already relies on debhelper, so the conversion is quite straightforward and brings additional benefits like binary reproducibility fixes or support for any future infrastructural change.

This MR also adds support for the <nodoc> profile.

Merge request reports