First Mantic Minotaur test rebuild

[Graham Inggs]

The first test rebuild of Mantic Minotaur was started on August 30,
2023 for all architectures, all components. The rebuild is finished
for the main component on all architectures except riscv64, and still
running for universe and multiverse.

Results (please also look at the superseded builds) can be found at:

https://people.canonical.com/~ginggs/ftbfs-report/test-rebuild-20230830-mantic-mantic.html

Additional build failures for packages in mantic-proposed (not yet in
mantic) can be found at:

http://qa.ubuntuwire.com/ftbfs/

Please help with fixing the build failures.

Graham