Default tooltip index is decided through selector, not reading DOM

[PavelVanecek]

Description

This removed some of the test failures, will continue in next PR.

Related Issue

#3717

Motivation and Context

Remove direct DOM access

How Has This Been Tested?

npm test

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• I have added a storybook story or extended an existing story to show my changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.59%. Comparing base (74fa2a3) to head (eb67702).

Additional details and impacted files

@@            Coverage Diff             @@
##              3.x    #4543      +/-   ##
==========================================
+ Coverage   95.58%   95.59%   +0.01%     
==========================================
  Files         116      116              
  Lines       22365    22430      +65     
  Branches     3073     3080       +7     
==========================================
+ Hits        21378    21443      +65     
  Misses        981      981              
  Partials        6        6              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.