Move CPU optimizations into their own role.

This is remove duplication between the individual hosts folders.

nix/configuration/hosts/neelix/default.nix

@@ -3,7 +3,6 @@
   imports = [
     ./hardware-configuration.nix
     ./disk-config.nix
-    ./optimized_build.nix
     ./power_management.nix
   ];
 
@@ -15,9 +14,22 @@
   time.timeZone = "America/New_York";
   i18n.defaultLocale = "en_US.UTF-8";
 
-  me.optimizations.enable = false;
   me.secureBoot.enable = false;
 
+  me.optimizations = {
+    enable = false;
+    arch = "alderlake";
+    system_features = [
+      "gccarch-alderlake"
+      "gccarch-x86-64-v3"
+      "gccarch-x86-64-v4"
+      "benchmark"
+      "big-parallel"
+      "kvm"
+      "nixos-test"
+    ];
+  };
+
   # Early KMS
   boot.initrd.kernelModules = [ "i915" ];