chore: Replaces the test utils generation with centralized code from test-utils package

[orangevolon]

Description

We moved the test utils generation code to the test-utils repo here. This PR removes the redundant code and reuses the utils exported from the test-utils repo.

No functional changes are expected. The snapshot diffs must be only spacings/ordering.

Similar to: cloudscape-design/code-view#54, cloudscape-design/board-components#332, cloudscape-design/chat-components#35

How has this been tested?

We have already implemented functional tests both in the test-utils repo and components repo which generates actual test utils and tries to query dom with the generated test utils.

• Unit tests for test utils.
• Unit tests for components.

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.42%. Comparing base (89ffd99) to head (04db318).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #3087    +/-   ##
========================================
  Coverage   96.42%   96.42%            
========================================
  Files         787      787            
  Lines       22190    22195     +5     
  Branches     7206     7555   +349     
========================================
+ Hits        21396    21401     +5     
+ Misses        787      742    -45     
- Partials        7       52    +45     

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