[BPO] libreoffice 24.2.6 for jammy

[Rico Tzschichholz]

[Impact]

 * LibreOffice 24.2.6 is in its sixth bugfix release of the 24.2 line:
     https://wiki.documentfoundation.org/ReleasePlan/24.2#24.2.6_release

 * This source packages matches the proposed SRU for noble handled at
     https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/2079005

[Scope]

 * Backport of https://launchpad.net/ubuntu/+source/libreoffice/4:24.2.6-0ubuntu0.24.04.1

 * Backport target is Jammy/22.04 LTS releases to provide an official build of a more recent upstream version of LibreOffice

[Testing]

 * Upstream testing. Bugs fixed upstream typically include unit/regression tests, and the release itself is extensively exercised (both in an automated manner and manually).

  * A recent set of upstream's automated jenkins testing can be found here:
    https://ci.libreoffice.org/job/gerrit_242/1400/

  * More information about the upstream QA testing can be found here:
    * Automated tests
      https://wiki.documentfoundation.org/QA/Testing/Automated_Tests
    * Automated UI tests
      https://wiki.documentfoundation.org/Development/UITests
    * Regression tests
      https://wiki.documentfoundation.org/QA/Testing/Regression_Tests
    * Feature tests
      https://wiki.documentfoundation.org/QA/Testing/Feature_Tests

 * Launchpad testing. The libreoffice packages include autopkgtests that were run and verified as passing.

   Jammy/22.04 build at https://launchpad.net/~libreoffice/+archive/ubuntu/libreoffice-still/+sourcepub/16431050/+listing-archive-extra
    * [amd64] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/amd64/libr/libreoffice/20240909_190508_68623@/log.gz
    * [arm64] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/arm64/libr/libreoffice/20240912_220439_e8324@/log.gz
    * [armhf] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/armhf/libr/libreoffice/20240912_122849_34776@/log.gz
    * [ppc64el] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/ppc64el/libr/libreoffice/20240909_190517_87f72@/log.gz
    * [riscv64] not available
    * [s390x] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/s390x/libr/libreoffice/20240909_213915_e008e@/log.gz

 * General smoke testing of all the applications in the office suite were carried out by going through the manual testplan as documented by: https://wiki.ubuntu.com/Process/Merges/TestPlans/libreoffice

[Regression Potential]

 * A combination of autopkgtests and careful smoke testing as described above should provide reasonable confidence that no regressions sneaked in.

[Mattia Rizzolo (mapreri)]

"to meat upstream requirements" 🍖🥩

I'm not going to let you fix that, accepted! :)