[Merge] ~enr0n/ubuntu/+source/systemd:ubuntu-kinetic into ~ubuntu-core-dev/ubuntu/+source/systemd:ubuntu-kinetic

[Nick Rosbrook]

Nick Rosbrook has proposed merging ~enr0n/ubuntu/+source/systemd:ubuntu-kinetic into ~ubuntu-core-dev/ubuntu/+source/systemd:ubuntu-kinetic.

Requested reviews:
  Lukas Märdian (slyon)
Related bugs:
  Bug #2002445 in systemd (Ubuntu): "udev NIC renaming race with mlx5_core driver"
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2002445

For more details, see:
https://code.launchpad.net/~enr0n/ubuntu/+source/systemd/+git/systemd/+merge/439251

The fix for LP: #2002445 is incomplete without these patches. In particular, udev needs to properly clean up modified device properties after failed renaming attempts. The full upstream PR is here: https://github.com/systemd/systemd/pull/25980.

Only the necessary commits from that PR are backported here.

PPA: https://launchpad.net/~enr0n/+archive/ubuntu/systemd-251
autopkgtest: 

systemd 251.4-1ubuntu7.3~ppa1 (amd64) -- Fail: https://autopkgtest.ubuntu.com/results/autopkgtest-kinetic-enr0n-systemd-251/kinetic/amd64/s/systemd/20230318_031454_a5637@/log.gz
systemd 251.4-1ubuntu7.3~ppa1 (arm64) -- Fail: https://autopkgtest.ubuntu.com/results/autopkgtest-kinetic-enr0n-systemd-251/kinetic/arm64/s/systemd/20230317_232929_32459@/log.gz
systemd 251.4-1ubuntu7.3~ppa1 (armhf) -- Pass: https://autopkgtest.ubuntu.com/results/autopkgtest-kinetic-enr0n-systemd-251/kinetic/armhf/s/systemd/20230317_202546_eaf77@/log.gz
systemd 251.4-1ubuntu7.3~ppa1 (ppc64el) -- Fail: https://autopkgtest.ubuntu.com/results/autopkgtest-kinetic-enr0n-systemd-251/kinetic/ppc64el/s/systemd/20230317_203751_951c0@/log.gz

These failures are due to LP: #2009859, and the failing tests will not be considered regressions. The s390x test got lost or wasn't triggered correctly.
-- 
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