feat: optimize the performance of datafusion planner

[ChunxuTang]

This PR optimizes the performance of the datafusion planner by:

• combining property filters together
• pre-allocating string capacity

[codecov-commenter]

Codecov Report

❌ Patch coverage is 80.64516% with 6 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@d6fd022). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
rust/lance-graph/src/datafusion_planner.rs	80.64%	6 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #34   +/-   ##
=======================================
  Coverage        ?   80.07%           
=======================================
  Files           ?       16           
  Lines           ?     7211           
  Branches        ?        0           
=======================================
  Hits            ?     5774           
  Misses          ?     1437           
  Partials        ?        0           

Flag	Coverage Δ
rust-unittests	80.07% <80.64%> (?)

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