chore: adds snapshot tests to main test utils wrappers

[orangevolon]

Description

1. Puts screenshot and functional tests in separate folders.
2. Adds screenshot tests for the test utils output.

Related links, issue #, if available: Pre-requisite to #2932

How has this been tested?

Tested by running the unit tests

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

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 96.27%. Comparing base (7175cd1) to head (77a8d98).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #2980    +/-   ##
========================================
  Coverage   96.27%   96.27%            
========================================
  Files         769      769            
  Lines       21766    21766            
  Branches     7384     7040   -344     
========================================
  Hits        20955    20955            
- Misses        758      803    +45     
+ Partials       53        8    -45     

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