fix: Stop using Msgpack custom extension on decoding buffers

[Gustrb]

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CONN-446

[dionisio-bot]

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Latest commit: d60925e

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.42%. Comparing base (19f34c5) to head (d60925e).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #35387   +/-   ##
========================================
  Coverage    59.42%   59.42%           
========================================
  Files         2829     2829           
  Lines        68334    68334           
  Branches     15133    15133           
========================================
  Hits         40610    40610           
  Misses       25066    25066           
  Partials      2658     2658           

Flag	Coverage Δ
unit	75.50% <ø> (ø)

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