[Spike] Analyze tooltip usage in Kibana and Cloud UI

[weronikaolejniczak]

The purpose of this task is to analyze the tooltip usage in Kibana and Cloud UI.

We are looking at these in particular:

• EuiToolTip
• EuiIconTip
• all components that render EuiToolTip/EuiIconTip
• title HTML attribute

We want to see:

• how many usages are there for each of these,
• what prop compositions are there,
• what kind of misuses people do,
• what customizations are made,
• how do the usages differ in font sizes, delay values, position,
• what wrappers are created in Kibana and Cloud UI for tooltip components.

Acceptance criteria

• The doc is updated with clear stats for each of the tooltip components.
• Conclusions are drawn on the repeating patterns:
  • misuses,
  • customizations made,
  • difference in: font size, delay, position.
• How these are queried and asserted in tests: Jest, Cypress, FTR, Scout, is considered.