ref(clubhouse): Shadow deprecate clubhouse plugin

[leeandher]

See: API-2137

This PR adds the clubhouse plugin to the map of shadow deprecated plugins. It prevents access to the plugin from the plugin directory and integration directory. This plugin is already hidden by default for those who don't have it installed already, but now even they won't see it listed.

With feature-flag enabled:

• External issue annotations are still visible

• Linked stories appear in the sidebar

• New stories can be created/linked in the sidebar

• Clubhouse appears in the integration + plugin directory (if installed)

---

Without feature-flag enabled:

• External issue annotations are gone

• Clubhouse stories are gone (and can no longer be created/linked)

• Clubhouse is missing from the integration + plugin directory (regardless of installation)

[github-actions]

size-limit report

Path	Base Size (767bf79)	Current Size	Change
src/sentry/static/sentry/dist/entrypoints/app.js	52.67 KB	52.67 KB	-0.01% 🔽
src/sentry/static/sentry/dist/entrypoints/sentry.css	70.9 KB	70.9 KB	0%