Bug#1016114: remmina: stop using libsoup2 version of spice-gtk

[Jeremy Bicha <jeremy.bicha@canonical.com>]

Source: remmina
Severity: important
Version: 1.4.27+dfsg-1
Tags: patch
Control: blocks 1016112 by -1
Forwarded: https://gitlab.com/Remmina/Remmina/-/issues/2754

I want to complete the phodav/spice-gtk transition to libsoup3.

Remmina won't run if it tries to use libsoup2.4 and libsoup3 in the
same process. The easiest temporary fix is to stop building
remmina-plugin-spice (along with a Breaks from the spice-gtk library
on that plugin). I have proposed this at
https://salsa.debian.org/debian-remote-team/remmina/-/merge_requests/3

Alternatively, Remmina could be updated to not use libsoup2 any more.
This is more complicated upstream since Remmina needs to support older
distros that don't have libsoup3 available.

Thank you,
Jeremy Bicha