Be consistent and use en* everywhere for matching ethernet interfaces

en is the prefix for ethernet according to systemd.net-naming-scheme(7)

host_vars/gemini.archlinux.org/misc

@@ -8,7 +8,6 @@ ipv6_netmask: "/128"
 ipv4_gateway: "49.12.124.65"
 ipv6_gateway: "fe80::1"
 filesystem: "btrfs"
-network_interface: "en*"
 system_disks:
   - /dev/sda
   - /dev/sdb

host_vars/packer-base-image

@@ -2,7 +2,6 @@
 hostname: "archlinux-packer"
 
 dhcp: true
-network_interface: "en*"
 filesystem: btrfs
 system_disks:
   - /dev/sda

host_vars/secure-runner1.archlinux.org/misc

@@ -8,7 +8,6 @@ ipv6_netmask: "/128"
 ipv4_gateway: "116.202.134.129"
 ipv6_gateway: "fe80::1"
 filesystem: "btrfs"
-network_interface: "en*"
 system_disks:
   - /dev/nvme0n1
   - /dev/nvme1n1

roles/networking/defaults/main.yml

 ---
 chroot_path: ""
-network_interface: "e*"
+network_interface: "en*"