[LIBSEARCH-987] Add a Class to <a> element in the "Resource Access" component

[erinesullivan]

Overview

To simplify Google Tag Manager triggers, the class access-link-cell has been added to the first column of every Holding row in tbody.

This pull request resolves LIBSEARCH-987.

Testing

• Make sure the PR is consistent in these browsers:
  • Chrome
  • Firefox
  • Safari
  • Edge
• Run accessibility tests:
  • WAVE
  • ARC Toolkit
  • axe DevTools
• Check a record that has holdings. Inspect the element that has the link Get This, Available online, Go to item, Go to database, Go to online journal, Request access, etc. and see if its parent cell has the class access-link-cell.