feat: add a blocking take to the 2.1 file reader (useful for takes against fast storage)

[westonpace]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 80.83624% with 55 lines in your changes missing coverage. Please review.

Project coverage is 78.68%. Comparing base (9f7e012) to head (924dddc).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
rust/lance-encoding/src/decoder.rs	77.93%	30 Missing and 2 partials ⚠️
rust/lance-file/src/v2/reader.rs	83.33%	18 Missing and 4 partials ⚠️
...ust/lance-encoding/src/encodings/logical/struct.rs	85.71%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3389      +/-   ##
==========================================
+ Coverage   78.51%   78.68%   +0.17%     
==========================================
  Files         250      250              
  Lines       90379    90759     +380     
  Branches    90379    90759     +380     
==========================================
+ Hits        70957    71413     +456     
+ Misses      16513    16421      -92     
- Partials     2909     2925      +16     

Flag	Coverage Δ
unittests	78.68% <80.83%> (+0.17%)	⬆️

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