Test all doc links and examples for...

• BigQuery (results)
  • Links/references (Update redirects and references for BigQuery docs. #3196)
  • Examples/Snippets
• Datastore 1 anchor reference error, (results)
  • Links/references (Update datastore batch API doc reference. #3186)
  • Examples/Snippets
• Storage
  • Links/references (Update 301 redirects for storage documentation. #3192) (results)
  • Examples/Snippets (generate_upload_policy snippet appears to be broken) (results) (PR: Fix storage encryption example, remove policy document example. #3221)
• Logging (results)
  • Links/references (Logging docs, update references that were 301 redirecting. #3187)
  • Examples/Snippets (Issue(s): Logging seems to not support type.googleapis.com/google.cloud.audit.AuditLog. #3218) (PR: Fix untested logging snippet examples. #3219), (results)
• Natural Language
  • Links/references (Update NL documentation references. #3197)
  • Examples/Snippets (results) (PR: Fix broken language examples. #3220)
• Speech
  • Links/references (Fix broken speech link. #3198)
  • Examples/Snippets (PR: Update speech usage examples. #3206) (results)
• Translation
  • Links/references (Fix translate links. #3199)
  • Examples/Snippets (results)
• Vision
  • Links/references (Fix vision documentation redirects and references. #3202)
  • Examples/Snippets (results) PR: Small updates to Vision examples. #3227

/cc @lukesneeringer @omaray