[Merge] ~enr0n/ubuntu/+source/systemd:ubuntu-kinetic-merge-251.2-2 into ~ubuntu-core-dev/ubuntu/+source/systemd:ubuntu-kinetic

[Nick Rosbrook]

Nick Rosbrook has proposed merging ~enr0n/ubuntu/+source/systemd:ubuntu-kinetic-merge-251.2-2 into ~ubuntu-core-dev/ubuntu/+source/systemd:ubuntu-kinetic.

Requested reviews:
  Lukas Märdian (slyon)
Related bugs:
  Bug #1967576 in systemd (Ubuntu): "systemd: autopkgtest: tests-in-lxd fails because of remaining snap .mount units"
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1967576
  Bug #1976607 in systemd (Ubuntu): "tests-in-lxd autopkgtest is skipped, due to missing 'lxd' deb"
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1976607
  Bug #1978079 in systemd (Ubuntu): "EFI pstore not cleared on boot"
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1978079
  Bug #1979215 in gnu-efi (Ubuntu): "gnu-efi: ld.bfd: warning: /usr/lib64/crt0-efi-x86_64.o: missing .note.GNU-stack section implies executable stack"
  https://bugs.launchpad.net/ubuntu/+source/gnu-efi/+bug/1979215
  Bug #1979236 in systemd (Ubuntu): "systemd: FTBFS on arm64 with binutils 2.38.50.20220615-4ubuntu1"
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1979236

For more details, see:
https://code.launchpad.net/~enr0n/ubuntu/+source/systemd/+git/systemd/+merge/425171

This merges systemd 251.2-2 from Debian unstable.

In addition to routine changes like refreshing patches and dropping patches that are now applied upstream, there are a few notable changes for review:

1. Patch debian/Ubuntu-core-in-execute-soft-fail-setting-Nice-priority-when.patch was dropped (details in changelog and git log)
2. Patch Add-support-for-TuxOnIce-hibernation.patch was dropped (details in changelog and git log)
3. The systemd-hwdb patches that allow `query --root` have been pulled in from upstream. This adds a new symbol to libsystemd0 because these patches were not included in the v251 release.
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