v1.17: Fix versioned message json deserialization (backport of #34808)

[mergify[bot]]

This is an automatic backport of pull request #34808 done by Mergify.

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[jstarry]

Merge blocked on https://github.com/solana-labs/solana/pull/34823

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (fbb11a8) 81.7% compared to head (db21cc6) 81.7%. Report is 1 commits behind head on v1.17.

Additional details and impacted files

@@            Coverage Diff            @@
##            v1.17   #34824     +/-   ##
=========================================
- Coverage    81.7%    81.7%   -0.1%     
=========================================
  Files         805      805             
  Lines      218805   218810      +5     
=========================================
  Hits       178772   178772             
- Misses      40033    40038      +5