Allow registry commands to skip local and remote

- Add local logout to `kamal registry logout`
- Add `skip_local` and `skip_remote` options to `kamal registry` commands
- Skip local login in `kamal deploy` when `--skip-push` is used

lib/kamal/cli/main.rb

@@ -25,7 +25,7 @@ class Kamal::Cli::Main < Kamal::Cli::Base
       invoke_options = deploy_options
 
       say "Log into image registry...", :magenta
-      invoke "kamal:cli:registry:login", [], invoke_options
+      invoke "kamal:cli:registry:login", [], invoke_options.merge(skip_local: options[:skip_push])
 
       if options[:skip_push]
         say "Pull app image...", :magenta
@@ -197,7 +197,7 @@ class Kamal::Cli::Main < Kamal::Cli::Base
         invoke "kamal:cli:traefik:remove", [], options.without(:confirmed)
         invoke "kamal:cli:app:remove", [], options.without(:confirmed)
         invoke "kamal:cli:accessory:remove", [ "all" ], options
-        invoke "kamal:cli:registry:logout", [], options.without(:confirmed)
+        invoke "kamal:cli:registry:logout", [], options.without(:confirmed).merge(skip_local: true)
       end
     end
   end