Add tables for global file downloads and external clicks on /metrics

[tdlowden]

User Story

In order to understand the totality of downloads and link clicks on the site, agency users wants unfiltered file download and external link data.

Acceptance Criteria

[ACs should be clearly demoable/verifiable whenever possible. Try specifying them using BDD.]

• GIVEN we don't have a way of attributing links to orgs on search results pages
  WHEN someone visits the main /metrics page happens
  THEN tables for global downloads and external link clicks will be present
  AND have associated downloadable full files

Background

The org-specific dataset pages do not account for link clicks directly from search results. This will help show the full picture

Security Considerations (required)

none

Sketch

• Create API calls for global downloads and external links

• Add tables for downloads and external links to global /metrics page

  MOST_DOWNLOADED_DATASETS_GLOBAL: {
  title: "Most Downloaded Dataset Files",
  description: "Top 10 downloaded files across catalog.data.gov, including links on dataset pages and search results pages",

  MOST_CLICKED_OUTBOUND_LINKS_GLOBAL: {
  title: "Most Downloaded Dataset Files",
  description: "Top 10 external link clicks across catalog.data.gov, including links on dataset pages and search results pages",

• Include download links for the global data