Restoring debhelper dh5 compat for the LTS?

[Sebastien Bacher]

Hey there,

Checking the desktop section of the ongoing archive rebuild we have a 
bunch of ftbfs due

 > dh: error: Compatibility levels before 7 are no longer supported 
(level 5 requested)

That's because the newest debhelper upload removed compatibility for 
level 5 and 6
https://salsa.debian.org/debian/debhelper/-/commit/a80ba4f797

Those issues are easy to fix but I would prefer us to focus on spending 
our effort on more user impacting problems so I'm suggesting we revert 
the change for the LTS.

How do other feel like about that?

Cheers,
Sebastien Bacher