[bullseye] Add patch to fix confusing duplicate printer dialog entries

Printers discovered directly via avahi instead of going through cups don't always work properly, in my case printing to such a printer will just keep spewing pages filled with binary garbage until the print job is cancelled manually.

Upstream fixed this in 3.24.25 as part of commit d07bfbec ("printing: Create temporary queues for Avahi printers") by changing the name mangling of printer names in the avahi case to match cups'. In this case existing code to deal with duplicates via the printer's UUID takes effect and prefers the cups printer.

The unrelated addition of a new feature makes this commit unsuitable for a stable update and so this patch cherry picks just the name mangling part.

Closes: Bug#982925