Refactor Linode configuration and update WireGuard settings

- Renamed SSH match block from 'vps' to 'linode' in jawz.nix for clarity.
- Updated IP addresses in toggles.nix and other configuration files to reflect the new Linode setup.
- Removed deprecated fail2ban configuration from linode's configuration.nix.
- Adjusted WireGuard interface settings to use the correct IP for linode.
- Cleaned up hardware configuration by removing unnecessary GRUB loader settings.
- Updated secrets management in wireguard.yaml to streamline key handling.

hosts/linode/wireguard-linode.nix

@@ -40,7 +40,7 @@
       };
       wireguard.interfaces.wg0 = {
         ips = [
-          "${config.my.ips.wg-vps}/24"
+          "${config.my.ips.wg-linode}/24"
           "${config.my.ips.wg-friends}/24"
         ];
         listenPort = 51820;