chore: various fixes to get the random data tests working on 2.1

[westonpace]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 85.55556% with 13 lines in your changes missing coverage. Please review.

Project coverage is 76.86%. Comparing base (828b315) to head (11039ff).

Files with missing lines	Patch %	Lines
rust/lance-encoding/src/statistics.rs	0.00%	8 Missing ⚠️
.../lance-encoding/src/encodings/logical/primitive.rs	91.30%	3 Missing and 1 partial ⚠️
rust/lance-encoding/src/repdef.rs	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3103      +/-   ##
==========================================
- Coverage   77.13%   76.86%   -0.28%     
==========================================
  Files         240      240              
  Lines       79833    79894      +61     
  Branches    79833    79894      +61     
==========================================
- Hits        61579    61410     -169     
- Misses      15082    15313     +231     
+ Partials     3172     3171       -1     

Flag	Coverage Δ
unittests	76.86% <85.55%> (-0.28%)	⬇️

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[broccoliSpicy]

thanks for fixing this!