feat: Make state change tracker a configurable class

[tvdeyen]

Summary

Currently we always enqueues a ActiveJob, but some stores maybe want to inline the state changes or add more information to the state change record. This allows to set your own state change tracker class. It defaults to the current behavior.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.46%. Comparing base (d3ef74b) to head (3cf18bb).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6375   +/-   ##
=======================================
  Coverage   89.46%   89.46%           
=======================================
  Files         975      976    +1     
  Lines       20335    20340    +5     
=======================================
+ Hits        18192    18197    +5     
  Misses       2143     2143           

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[solidus-bot]

💚 All backports created successfully

Status	Branch	Result
✅	v4.6

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