8.8 Data Quality dashboard updates

[benironside]

Various updates to the Data Quality dashboard in 8.8

User stories are here: https://github.com/elastic/security-team/issues/6047
PR and Andrew's notes are here: elastic/kibana#155581
Nastasha's great notes here: https://docs.google.com/document/d/1l19A1bIuz_8J5PxS-fe0QM9agnQiMr5R8hNJbohGn5A/edit#

Storage metrics are going to be under a new tab called the Storage tab.
The Storage tab is being added to the right of the Indices tab in the Data Quality dashboard.
Business value/customer driver: User is able to view their global storage metric, how much data is being stored in each tier, and how much data is being stored in individual indices (need to verify whether this is individual indices or index patterns).
When users click the Check all button, they’ll see a treemap view that’s broken down by data tier (hot, medium, and cold). Additional information about indices is included.

Other changes:
The dashboard is moving from beta to GA. The beta tag has been removed from the dashboard and main Dashboards page.
A new Size field added to the following areas in the dashboard:
Top level (shows how much data the user has in all of their indices)
Index-pattern level (shows how much data is contained in the index pattern)
Index level (shows how much data is in a particular index)
Minor UI changes:
The ILM phase bar has been moved from the top right of the Data Quality dashboard to directly under the page title.
The Take action button has been removed. In addition, the two options that were formerly in the Take action menu were moved up a level (Add to new case and Copy to clipboard).