[BPO] libreoffice 7.5.5 for jammy

[Rico Tzschichholz]

[Impact]

 * LibreOffice 7.5.5 is in its fifth bugfix release of the 7.5 line:
     https://wiki.documentfoundation.org/ReleasePlan/7.5#7.5.5_release

 * This source packages matches the proposed SRU for lunar handled at
     https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/2027671

[Scope]

 * Backport of https://launchpad.net/ubuntu/+source/libreoffice/1:7.5.5-0ubuntu0.23.04.1

 * 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_75/1589/

  * 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/ppa/+sourcepub/15030768/+listing-archive-extra
    * [amd64] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-prereleases/jammy/amd64/libr/libreoffice/20230731_192234_8322c@/log.gz
    * [arm64] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-prereleases/jammy/arm64/libr/libreoffice/20230801_175640_b770c@/log.gz
    * [armhf] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-prereleases/jammy/armhf/libr/libreoffice/20230802_004552_466b5@/log.gz
    * [ppc64el] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-prereleases/jammy/ppc64el/libr/libreoffice/20230731_233548_dd836@/log.gz
    * [s390x] https://autopkgtest.ubuntu.com/results/autopkgtest-jammy-libreoffice-libreoffice-prereleases/jammy/s390x/libr/libreoffice/20230731_235942_b3389@/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)]

thank you for your work!