feat: Pass filter to inner readers in multiscan new streaming

[coastalwhite]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 87.13450% with 22 lines in your changes missing coverage. Please review.

Project coverage is 80.02%. Comparing base (00a0b87) to head (843ea74).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...s/polars-stream/src/nodes/io_sources/multi_scan.rs	79.06%	9 Missing ⚠️
...polars-mem-engine/src/executors/multi_file_scan.rs	0.00%	6 Missing ⚠️
crates/polars-plan/src/dsl/file_scan.rs	62.50%	3 Missing ⚠️
crates/polars-io/src/predicates.rs	97.75%	2 Missing ⚠️
crates/polars-stream/src/physical_plan/lower_ir.rs	0.00%	1 Missing ⚠️
crates/polars-stream/src/physical_plan/to_graph.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21436      +/-   ##
==========================================
+ Coverage   80.00%   80.02%   +0.01%     
==========================================
  Files        1597     1597              
  Lines      229024   229111      +87     
  Branches     2620     2620              
==========================================
+ Hits       183229   183343     +114     
+ Misses      45196    45169      -27     
  Partials      599      599              

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