Fix embed dropdown menu item for unauthenticated users (#25964)

app/controllers/api/web/embeds_controller.rb

app/javascript/mastodon/components/status_action_bar.jsx

app/javascript/mastodon/containers/status_container.jsx

...script/mastodon/features/status/components/action_bar.jsx

...n/features/status/containers/detailed_status_container.js

app/javascript/mastodon/features/status/index.jsx

...avascript/mastodon/features/ui/components/embed_modal.jsx

config/routes/api.rb

spec/controllers/api/web/embeds_controller_spec.rb

spec/requests/api/web/embeds_spec.rb