With lvm2 the generated fedora fc38 boot image boots in degraded
mode with the following error:
```
[root@localhost ~]# journalctl -u lvm2-monitor.service|more
Nov 13 12:52:04 localhost.localdomain lvm[431]: Failed to create /etc/lvm/devi
ces 2
Nov 13 12:52:04 localhost.localdomain lvm[431]: Failed to set up devices.
Nov 13 12:52:04 localhost.localdomain systemd[1]: lvm2-monitor.service: Main pro
cess exited, code=exited, status=5/NOTINSTALLED
Nov 13 12:52:04 localhost.localdomain systemd[1]: lvm2-monitor.service: Failed w
ith result 'exit-code'.
Nov 13 12:52:04 localhost.localdomain systemd[1]: Failed to start lvm2-monitor.s
ervice - Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress p
olling.
```
This breaks the `test_boot.py` which expects the system after booting
in `running` state (from `systemd is-system-running`).
It looks like this is some sort of race with our generated image,
potentially related to selinux, see
https://github.com/lvmteam/lvm2/blob/v2_03_18/lib/device/dev-cache.c#L1842
and note the lines around dm_prepare_selinux_context(). Note
also that `lvm2-monitor.service` runs with `DefaultDependencies=no`
(c.f.
https://github.com/lvmteam/lvm2/blob/v2_03_18/scripts/lvm2_monitoring_systemd_red_hat.service.in#L7)
Given that the official fc38 cloud image does not use lvm2 and that
it's not needed for the boot test this commit simply removes it
from the fedora-boot manifest. This fixes the test.
f4f0c8f004