Bug#1101461: libreplaygain: Directly use debhelper instead of abandoned cdbs

[Gioele Barabucci <gioele@svario.it>]

Package: src:libreplaygain
Version: 1.0~r475-3
Tags: patch

Dear libreplaygain maintainers,

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 converting the
packaging to the standard `dh` sequence is quite straightforward and
brings additional benefits like binary reproducibility fixes and support
for any future infrastructural change.

A small MR that implements the switch to dh is available at:

https://salsa.debian.org/multimedia-team/libreplaygain/-/merge_requests/1

Regards,

--
Gioele Barabucci