Fix references to the shaded jar for performance tests and in doc

[t2gran]

Summary

Fix the broken performance test and a few references to the shaded jar in in doc.

Issue

🟥 No issue for this.

Unit tests

🟥 Not relevant.

Documentation

✅ Updated.

Changelog

🟥 Not relevant.

Bumping the serialization version id

🟥 Not relevant.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.79%. Comparing base (0ce1067) to head (3952cfc).
Report is 3 commits behind head on dev-2.x.

Additional details and impacted files

@@            Coverage Diff             @@
##             dev-2.x    #6310   +/-   ##
==========================================
  Coverage      69.79%   69.79%           
  Complexity     17785    17785           
==========================================
  Files           2017     2017           
  Lines          76035    76035           
  Branches        7781     7781           
==========================================
  Hits           53070    53070           
  Misses         20260    20260           
  Partials        2705     2705           

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[leonardehrenfried]

I'm happy for you to use your admin priviledges to merge it without a second reviewer.

[leonardehrenfried]

I noticed another problem: the shaded jar is no longer published to the Maven repo because the packaging of shaded-jar is pom.

This is used for publishing the shaded jar to Maven Central but also for myself when I download the latest snapshot from Github. Let's decide in the dev meeting if any of these things are worth having.