[BPO] libreoffice 25.2.7 for jammy/noble

[Rico Tzschichholz]

[Impact]

 * LibreOffice 25.2.7 is in its seventh and last bugfix release of the 25.2 line:
     https://wiki.documentfoundation.org/ReleasePlan/25.2#25.2.7_release

 * This source packages matches the proposed SRU for plucky handled at
     https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/2130403

[Scope]

 * Backport of https://launchpad.net/ubuntu/+source/libreoffice/4:25.2.7-0ubuntu0.25.04.1

 * Backport target is Jammy/22.04 LTS and Noble/24.04 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_252/1187/

  * 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 https://launchpad.net/~libreoffice/+archive/ubuntu/libreoffice-still/+sourcepub/17847565/+listing-archive-extra
    * [amd64] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/amd64/libr/libreoffice/20251128_224837_063f6@/log.gz
    * [arm64] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/arm64/libr/libreoffice/20251130_124006_1db6d@/log.gz
    * [armhf] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/armhf/libr/libreoffice/20251201_163333_6a77d@/log.gz
    * [ppc64el] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/ppc64el/libr/libreoffice/20251130_161635_0d531@/log.gz (no regression)
    * [riscv64] not available
    * [s390x] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-still/jammy/s390x/libr/libreoffice/20251129_214128_cef21@/log.gz (no regression)

    * Packaging changes are staged at https://git.launchpad.net/~libreoffice/ubuntu/+source/libreoffice/log/?h=wip/jammy-25.2

   Noble/24.04 build at https://launchpad.net/~libreoffice/+archive/ubuntu/libreoffice-still/+sourcepub/17847573/+listing-archive-extra
    * [amd64] https://autopkgtest.ubuntu.com/results/autopkgtest-noble-libreoffice-libreoffice-still/noble/amd64/libr/libreoffice/20251129_012144_b7068@/log.gz
    * [arm64] https://autopkgtest.ubuntu.com/results/autopkgtest-noble-libreoffice-libreoffice-still/noble/arm64/libr/libreoffice/20251130_130444_f29d4@/log.gz
    * [armhf] ...
    * [ppc64el] https://autopkgtest.ubuntu.com/results/autopkgtest-noble-libreoffice-libreoffice-still/noble/ppc64el/libr/libreoffice/20251130_061455_caf3d@/log.gz (no regression)
    * [riscv64] not available
    * [s390x] https://autopkgtest.ubuntu.com/results/autopkgtest-noble-libreoffice-libreoffice-still/noble/s390x/libr/libreoffice/20251130_153038_298f7@/log.gz (no regression)

    * Packaging changes are staged at https://git.launchpad.net/~libreoffice/ubuntu/+source/libreoffice/log/?h=wip/noble-25.2

 * 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.