refactor: move LazyTableProvider into python crate

[roeap]

Description

A small step in making our datafusion module a bit more parse-able. The LazyTableProvider is not used in the core crate, but only in the python crate, thus moving it over there.

[codecov]

Codecov Report

Attention: Patch coverage is 82.57261% with 42 lines in your changes missing coverage. Please review.

Project coverage is 74.18%. Comparing base (caaf56a) to head (bc0b5fe).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
python/src/datafusion.rs	82.57%	32 Missing and 10 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3509      +/-   ##
==========================================
+ Coverage   74.03%   74.18%   +0.14%     
==========================================
  Files         148      149       +1     
  Lines       44333    44505     +172     
  Branches    44333    44505     +172     
==========================================
+ Hits        32822    33015     +193     
+ Misses       9377     9342      -35     
- Partials     2134     2148      +14     

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