ceph 17.2.0 unsatisifiable dependency in lunar (missing python 3.11 support)

    Migration status for ceph (17.2.0-0ubuntu4 to 17.2.0-0ubuntu6): BLOCKED: Rejected/violates migration policy/introduces a regression
    Issues preventing migration:
    ceph-common/arm64 has unsatisfiable dependency
    ...

Problem is that ceph upstream has not implemented python 3.11 support, so the no-change rebuilds in -proposed have been failing and the current release version (with 3.10 support) fails in dep8 testing.

  - We're ahead of Debian with 17.2.0

  - There are newer releases upstream, 17.2.[1-5]
    https://ceph.com/en/news/blog/2022/v17-2-1-quincy-released/
    https://ceph.com/en/news/blog/2022/v17-2-2-quincy-released/
    https://ceph.com/en/news/blog/2022/v17-2-3-quincy-released/
    https://ceph.com/en/news/blog/2022/v17-2-4-quincy-released/
    https://ceph.com/en/news/blog/2022/v17-2-5-quincy-released/

  - See LP: #1998958 "[SRU] ceph 17.2.5"

  - However, the real issue is python3.11 support is missing, even in the
    current upstream codebase. See line 20:
    https://github.com/ceph/ceph/blob/main/cmake/modules/FindPython/Support.cmake
    set(_${_PYTHON_PREFIX}_VERSIONS 3.10 3.9 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0)

  - Adding 3.11 to that line seems required, but more might be needed.
    See this upstream PR:
    https://github.com/ceph/ceph/pull/48947