[Merge] ~mustafakemalgilor/ubuntu/+source/systemd:systemd-fix-lp1978079-efi-pstore-not-cleared-focal into ~ubuntu-core-dev/ubuntu/+source/systemd:ubuntu-focal

[Mustafa Kemal Gilor]

There is no particular reason. This is my first merge proposal and I've followed the Ubuntu Maintainer's Handbook (https://github.com/canonical/ubuntu-maintainers-handbook/blob/main/MergeProposal.md) for structuring my MP. It seems like either I've missed something, or the handbook is outdated. 
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https://code.launchpad.net/~mustafakemalgilor/ubuntu/+source/systemd/+git/systemd/+merge/425083
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