[cargo-nextest] check store format version at export time

[sunshowers]

Realized that these code paths were missing store format version checking.

[codecov]

Codecov Report

❌ Patch coverage is 84.37500% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.60%. Comparing base (ea968b5) to head (095a569).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
nextest-runner/src/record/format.rs	73.33%	4 Missing ⚠️
cargo-nextest/src/dispatch/utility/store.rs	93.75%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3287      +/-   ##
==========================================
+ Coverage   85.51%   85.60%   +0.08%     
==========================================
  Files         160      160              
  Lines       47827    47858      +31     
==========================================
+ Hits        40898    40967      +69     
+ Misses       6929     6891      -38     

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[trunk-io]

     

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