Container build failures for cross-builds on debian-11

Weekly container builds fail for almost 2 months now (last passed container build was on 2nd of September) due to debian-11 being probably broken when installing cross-arch packages. Debian 12 was released at the 10th of June 2023, so we support debian-11 for 7 more months. But the cross-builds are probably going to fail for all those 7 months. Since that spoils the view of the pipelines I would suggest we remove the cross-architecture builds for debian-11 since we're still testing them on debian-12 and that works nicely. We would still keep x86_64 and i686 debian-11 builds there of course. Is anyone opposed to that or is there any clear issue with the above suggestion?