[ Reason ]
Fix FTBFS Bug #1134307. Build failure due to a no longer working test.

[ Impact ]
Everybody trying to build the package will find that the package does not
build in current trixie.

[ Tests ]
I've tested that the package builds again.

[ Risks ]
Very low. No code changes, we are just disabling tests.

[ Checklist ]
   [X] *all* changes are documented in the d/changelog
   [X] I reviewed all changes and I approve them
   [X] attach debdiff against the package in (old)stable
   [X] the issue is verified as fixed in unstable

[ Changes ]
Disable no longer working test.

[ Other info ]
Change is trivial. Package is already uploaded.