Top Right docViewer linkable plugin injection

[RoyiSitbon]

Is your feature request related to a problem? Please describe.
Currently, we don't have an option to assimilate links under our top doc view section.
The “view surrounding documents” and “view single document” were written as static content.
We would like to make the top right side under doc view to be pluggable,
in order to assimilate new abilities such as “open in new tab icons” etc.

Before:

After:

Describe the solution you'd like
Since we don't find a reason to put something other than links inside this location,
we would like to create a new application component called DocViewerLinks
under dashboards/src/plugins/discover/public/application/components/doc_viewer_links
this component will contain linkable components and will be enriched by other links similarly to the docView tabs logic.

The enriched information will be comprised from:
{ …EuiListGroupItemProps, order: number; generateUrlFn?(renderProps: any): string; }

If we will pass generateUrlFn then we will link the result returned by it, else we will just take the href.

Additional context
After we will have this ability, we will be able to replace
application/angular/doc_table/components/table_row/details.html → link elements, with something like this:

and enrich links by demand with order prop.