feat: Add negative slice support to new-streaming engine

[orlp]

This should be the last computational todo! in the new-streaming engine.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 101 lines in your changes missing coverage. Please review.

Project coverage is 79.21%. Comparing base (96a2d01) to head (b4cd857).
Report is 46 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-stream/src/nodes/negative_slice.rs	0.00%	93 Missing ⚠️
crates/polars-stream/src/physical_plan/lower_ir.rs	0.00%	7 Missing ⚠️
crates/polars-stream/src/physical_plan/mod.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21001      +/-   ##
==========================================
- Coverage   79.34%   79.21%   -0.13%     
==========================================
  Files        1579     1583       +4     
  Lines      224319   225082     +763     
  Branches     2573     2581       +8     
==========================================
+ Hits       177976   178296     +320     
- Misses      45755    46196     +441     
- Partials      588      590       +2     

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