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.

parts/images.nix

@@ -1,8 +1,5 @@
 { inputs, ... }:
 {
-  flake.packages.x86_64-linux.linode-image = inputs.nixos-generators.nixosGenerate {
-    system = "x86_64-linux";
-    modules = [ inputs.self.nixosConfigurations.linode.config.system.build.toplevel.outPath ];
-    format = "linode";
-  };
+  flake.packages.x86_64-linux.linode-image =
+    inputs.self.nixosConfigurations.linode.config.system.build.linodeImage;
 }