feat(wpcarro/diogenes): Support rebuild-diogenes

- deploy-diogenes: terraform updates + NixOS rebuilds
- rebuild-diogenes: NixOS rebuilds

Change-Id: Ibd6db7115d9919fa44ee9d318f88e1bf29e2bdce
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5160
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>

users/wpcarro/bin/__dispatch.sh

@@ -12,6 +12,9 @@ case "${TARGET_TOOL}" in
   deploy-diogenes)
     attr="users.wpcarro.nixos.deploy-diogenes"
     ;;
+  rebuild-diogenes)
+    attr="users.wpcarro.nixos.rebuild-diogenes"
+    ;;
   import-gpg)
     attr="users.wpcarro.configs.import-gpg"
     ;;

users/wpcarro/bin/rebuild-diogenes

@@ -0,0 +1 @@
+__dispatch.sh