Removing as many modifications to the rendered DOM as possible

[mpRegalado]

The issue
In several parts of the code, most notably in the sections regarding the Discovery Legacy tables, the application executes as follows:

1. The data is rendered through the Discovery Plugin
2. An external function waits a specified time and checks whether the table has loaded and
3. the external function goes through each element of the table and modifies it as needed.
   This causes the code to be slower and less efficient, as well as harder to maintain.
   The proposed solution
   It would be a good idea to move the functionality of these functions into encapsulated function calls that are executed at render time for the table, having these functions in a library outside of the discover plugin in order to make possible upgrades to the plugin as simple as possible.
   Some files that are affected

• The method enhanceDiscoverEventsCell in public/components/common/modules/events-enhance-discover-fields.ts and enhanceDiscoverTableAddObservers in public/components/common/modules/events.tsx affect the rows rendered in the file public/kibana-integrations/discover/application/components/table/table_row.tsx

[Desvelao]

The discover table was replaced in the current application #6120, so this is outdated and could be closed as not planned.