feat: enable tracing for object storage

[wjones127]

We have this on by default for local fs and in-memory. We also want this for object storage.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 78.49%. Comparing base (99ae761) to head (d1dbbb6).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
rust/lance-io/src/object_store.rs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3244      +/-   ##
==========================================
- Coverage   78.49%   78.49%   -0.01%     
==========================================
  Files         245      245              
  Lines       85065    85065              
  Branches    85065    85065              
==========================================
- Hits        66776    66774       -2     
- Misses      15474    15478       +4     
+ Partials     2815     2813       -2     

Flag	Coverage Δ
unittests	78.49% <66.66%> (-0.01%)	⬇️

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