Refactor the E2E framework. Add migration framework.

[blackpiglet]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.17%. Comparing base (78c97d9) to head (60b9d8d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8564   +/-   ##
=======================================
  Coverage   59.17%   59.17%           
=======================================
  Files         370      370           
  Lines       39487    39487           
=======================================
  Hits        23366    23366           
  Misses      14647    14647           
  Partials     1474     1474           

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