ISTWCMS-4104: assorted token fixes/cleanup

config/install/metatag.metatag_defaults.node.yml

 langcode: en
 status: true
 dependencies: {  }
-_core:
-  default_config_hash: rpwvgyEURXLz_JjgMCrkS1rUv-0k3L79BpO-ReN7fDI
 id: node
 label: Content
 tags:
-  shortlink: '[current-page:url:unaliased]'
-  description: '[node:summary]'
+  description: '[node:field_uw_meta_description]'
   title: '[current-page:title] | [site:name]'
+  image_src: '[node:field_uw_meta_image], https://uwaterloo.ca/university-of-waterloo-logo-152.png'
   canonical_url: '[current-page:url:absolute]'
-  image_src: '[node:field_event_image],[node:field_image]'
-  og_description: '[node:metatag:description]'
+  content_language: '[node:langcode]'
+  og_description: '[current-page:metatag:description]'
   og_updated_time: '[node:changed:custom:c]'
-  og_image: '[node:metatag:image_src]'
-  og_title: '[node:metatag:title]'
+  og_title: '[current-page:metatag:title]'
+  og_image: '[current-page:metatag:image_src]'
+  og_locale: '[current-page:metatag:content_language]_CA'
   og_url: '[current-page:url:absolute]'
-  og_locale: '[node:metatag:content-language]'
-  og_type: Article
-  twitter_cards_title: '[node:metatag:title]'
-  twitter_cards_page_url: '[current-page:url:absolute]'
-  twitter_cards_description: '[node:metatag:description]'
-  twitter_cards_image: '[node:metatag:image_src]'
-  twitter_cards_type: summary
+  twitter_cards_type: summary_large_image