Description:
Fresh installs of libvirtd (particularly with qemu, but I suspect that is unrelated) throw an error when enabling the libvirtd service. This error is solved by installing the dmidecode package and restarting the libvirtd service. It seems dmidecode is required for libvirtd not to crash.

Additional info:
* Related forum post: https://bbs.archlinux.org/viewtopic.php?pid=2114006#p2114006
* Output of `sudo systemctl status libvirtd.service` (Hostname redacted with $HOST):
```○ libvirtd.service - Virtualization daemon
Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; preset: disabled)
Active: inactive (dead) since Sun 2023-08-06 18:33:56 MDT; 11s ago
Duration: 2min 8ms
TriggeredBy: ● libvirtd-admin.socket
● libvirtd-ro.socket
● libvirtd.socket
Docs: man:libvirtd(8)
https://libvirt.org
Process: 41122 ExecStart=/usr/bin/libvirtd $LIBVIRTD_ARGS (code=exited, status=0/SUCCESS)
Main PID: 41122 (code=exited, status=0/SUCCESS)
CPU: 190ms

Aug 06 18:31:56 $HOST systemd[1]: Starting Virtualization daemon...
Aug 06 18:31:56 $HOST systemd[1]: Started Virtualization daemon.
Aug 06 18:31:56 $HOST libvirtd[41122]: libvirt version: 9.6.0
Aug 06 18:31:56 $HOST libvirtd[41122]: hostname: $HOST
Aug 06 18:31:56 $HOST libvirtd[41122]: Cannot find 'dmidecode' in path: No such file or directory
Aug 06 18:31:56 $HOST libvirtd[41122]: Cannot find 'dmidecode' in path: No such file or directory
Aug 06 18:32:20 $HOST systemd[1]: /usr/lib/systemd/system/libvirtd.service:34: Unknown key name 'LimitNOFile' >
Aug 06 18:33:56 $HOST systemd[1]: libvirtd.service: Deactivated successfully.```

Steps to reproduce:
1. Install the libvirt package (# pacman -Syu libvirt <hypervisor packages> iptables-nft [openbsd-netcat] )
2. Attempt to start libvirtd.service (# systemctl start libvirtd.service )
3. Check the status of libvirtd.service ($ systemctl status libvirtd.service)

Proposed Solution:
The dmidecode package should be marked as a dependency of the libvirt package.