Fix embedding plugins init (#32138)

...ingAppOriginDescription/EmbeddingAppOriginDescription.tsx

...bedding/components/EmbeddingAppOriginDescription/index.ts

...prise/frontend/src/metabase-enterprise/embedding/index.js

frontend/src/metabase/admin/routes.jsx

...settings/app/components/SettingsEditor/SettingsEditor.jsx

...ase/admin/settings/app/components/SettingsEditor/index.ts

.../app/components/SettingsEditor/tests/common.unit.spec.tsx

.../components/SettingsEditor/tests/enterprise.unit.spec.tsx

...app/components/SettingsEditor/tests/premium.unit.spec.tsx

...in/settings/app/components/SettingsEditor/tests/setup.tsx

...gs/components/widgets/EmbeddingCustomizationInfo/index.ts

...ddingCustomizationWidget/EmbeddingCustomizationWidget.tsx

...mizationWidget/EmbeddingCustomizationWidget.unit.spec.tsx

.../components/widgets/EmbeddingCustomizationWidget/index.ts

...FullAppEmbeddingLinkWidget/FullAppEmbeddingLinkWidget.tsx

...eddingLinkWidget/FullAppEmbeddingLinkWidget.unit.spec.tsx

...gs/components/widgets/FullAppEmbeddingLinkWidget/index.ts

frontend/src/metabase/admin/settings/selectors.js

frontend/src/metabase/plugins/index.ts

frontend/test/__support__/enterprise.js