Even with Storage=journal we would still attempt to open the final
dmesg.txt file which causes a lot of noise in the journal:
```
[ 5.764111] H testsuite-82.sh[658]: + systemctl start systemd-pstore
[ 5.806385] H systemd[1]: Starting modprobe@efi_pstore.service...
[ 5.808656] H systemd[1]: modprobe@efi_pstore.service: Deactivated successfully.
[ 5.808971] H systemd[1]: Finished modprobe@efi_pstore.service.
[ 5.818845] H kernel: audit: type=1130 audit(
1682630623.637:114): pid=1 uid=0 auid=
4294967295 ses=
4294967295 subj=kernel msg='unit=modprobe@efi_pstore comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? termin>
[ 5.818865] H kernel: audit: type=1131 audit(
1682630623.637:115): pid=1 uid=0 auid=
4294967295 ses=
4294967295 subj=kernel msg='unit=modprobe@efi_pstore comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? termin>
[ 5.816052] H systemd[1]: Starting systemd-pstore.service...
[ 5.840703] H systemd-pstore[806]: PStore dmesg-efi-
168263062313014.
[ 5.841239] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.841428] H systemd-pstore[806]: PStore dmesg-efi-
168263062312014.
[ 5.841575] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.841712] H systemd-pstore[806]: PStore dmesg-efi-
168263062311014.
[ 5.841839] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.841989] H systemd-pstore[806]: PStore dmesg-efi-
168263062310014.
[ 5.842141] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.842274] H systemd-pstore[806]: PStore dmesg-efi-
168263062309014.
[ 5.842423] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.842589] H systemd-pstore[806]: PStore dmesg-efi-
168263062308014.
[ 5.842722] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.842865] H systemd-pstore[806]: PStore dmesg-efi-
168263062307014.
[ 5.843003] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.843153] H systemd-pstore[806]: PStore dmesg-efi-
168263062306014.
[ 5.843280] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.843434] H systemd-pstore[806]: PStore dmesg-efi-
168263062305014.
[ 5.843570] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.843702] H systemd-pstore[806]: PStore dmesg-efi-
168263062304014.
[ 5.843831] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.843958] H systemd-pstore[806]: PStore dmesg-efi-
168263062303014.
[ 5.844093] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.844250] H systemd-pstore[806]: PStore dmesg-efi-
168263062302014.
[ 5.844412] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.844619] H systemd-pstore[806]: PStore dmesg-efi-
168263062301014.
[ 5.844781] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.844956] H systemd-pstore[806]: PStore dmesg-efi-
168263062300014.
[ 5.845168] H systemd-pstore[806]: Failed to open file /var/lib/systemd/pstore/
1682630623/014/dmesg.txt: Operation not permitted
[ 5.851101] H systemd[1]: Finished systemd-pstore.service.
```