mkosi: Add more packages required to run systemd-networkd-tests.py

Let's also add the required packages to run systemd-networkd-tests.py
for Ubuntu and Debian. The Fedora and Arch lists are also updated to
include python which is also required to run the tests.

mkosi.default.d/arch/10-mkosi.arch

@@ -64,6 +64,7 @@ Packages=
         # Run `autoload -Uz compinit; compinit` from a zsh shell in the booted image to enable completions.
         zsh
         # Required to run systemd-networkd-tests.py
+        python
         iproute
         dnsmasq
         wireguard-tools

mkosi.default.d/debian/10-mkosi.debian

@@ -73,3 +73,9 @@ Packages=
         locales
         nano
         strace
+        # Required to run systemd-networkd-tests.py
+        python3
+        iproute2
+        dnsmasq-base
+        wireguard-tools
+        isc-dhcp-server

mkosi.default.d/fedora/10-mkosi.fedora

@@ -76,6 +76,7 @@ Packages=
         e2fsprogs
         compsize
         # Required to run systemd-networkd-tests.py
+        python
         iproute
         iproute-tc
         dnsmasq

mkosi.default.d/ubuntu/10-mkosi.ubuntu

@@ -71,3 +71,9 @@ Packages=
         locales
         nano
         strace
+        # Required to run systemd-networkd-tests.py
+        python3
+        iproute2
+        dnsmasq-base
+        wireguard-tools
+        isc-dhcp-server