Make ExternalLink accessible (#19870)

...onents/DataPermissionsHelp/DataPermissionsHelp.styled.jsx

enterprise/frontend/src/metabase-enterprise/auth/index.js

...s/LicenseAndBillingSettings/LicenseAndBillingSettings.tsx

...atabases/components/widgets/EngineWidget/EngineWidget.jsx

.../containers/DataModelApp/ModelEducationalModal.styled.tsx

...metabase/admin/settings/components/SettingsGoogleForm.jsx

...ngs/components/SettingsLicense/content/StarterContent.tsx

.../components/SettingsLicense/content/UnlicensedContent.tsx

.../metabase/admin/settings/components/SettingsSlackForm.jsx

...gsUpdatesForm/VersionUpdateNotice/VersionUpdateNotice.jsx

...ettings/components/widgets/EmbeddingCustomizationInfo.tsx

...e/admin/settings/components/widgets/EmbeddingLegalese.jsx

...ase/admin/settings/components/widgets/HostingInfoLink.jsx

.../admin/settings/components/widgets/PublicLinksListing.jsx

...emiumEmbeddingLicensePage/PremiumEmbeddingLicensePage.tsx

...ack/components/SlackAppsButton/SlackAppsButton.styled.tsx

...s/slack/components/SlackHelpCard/SlackHelpCard.styled.tsx

...ettings/slack/components/SlackSetup/SlackSetup.styled.tsx

...min/settings/slack/components/SlackStatus/SlackStatus.tsx

frontend/src/metabase/admin/tasks/containers/Help.jsx