chore: e2e fixes for list tests

[moritzraho]

Description

• add a test for .list() bug ? #194. This has been used to test a fix locally.
  Note to reviewers: there is a trade-off here as this test considerably increases the execution time (from .5 minutes to 2.5 minutes on my local machine) on the deployment path too. This is now tested via a unit test on the server.

• stabilize list e2e tests and improve helper functions

Related Issue

Motivation and Context

How Has This Been Tested?

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:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (2ce4a07) to head (2549cef).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #197   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         6           
  Lines          272       272           
  Branches        47        47           
=========================================
  Hits           272       272           

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