Implement data attributes on Articles Lists (on post type pages)

Context:

Implement a set of new data attributes on the Articles List (available in post type pages such as https://k8s.p4.greenpeace.org/test-titan/publication/ or https://k8s.p4.greenpeace.org/test-titan/story/) with standard values. These will be used later to trigger events and define its category, action and label. 

Here's a screenshot linking the elements with the data-ga-action standard values:

 Obs: The data attributes should be applied to the Articles List available in post type pages: https://k8s.p4.greenpeace.org/test-titan/story/ and Author's pages

Task: 

• Implement data-attributes on elements:
  • data-ga-category
  • data-ga-action
  • data-ga-label 
• Implement data-attributes with the following standard values: 

  data-ga-category	data-ga-action	data-ga-label
  Articles List	Title Image Navigation Tag Post Type Tag Load More Button	n/a

  
 **To view all events standards and data-attributes structure proposed: "P4 Events Standards - 2020 Review"