perf: Back arrow arrays with SharedStorage which can have non-refcounted static slices

[orlp]

We use this ability to make all small zero bitmasks share memory, without contention. We just leak 1MiB of zeroed memory once and then everything can refer to that.

We should extend this in the future also to zeroed PrimitiveArrays, referring to the same memory (the alignment of the memory has to be increased then).

[codecov]

Codecov Report

Attention: Patch coverage is 97.10145% with 6 lines in your changes missing coverage. Please review.

Project coverage is 79.93%. Comparing base (ad9a1d8) to head (e6fa9c6).
Report is 37 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-arrow/src/bitmap/immutable.rs	93.75%	3 Missing ⚠️
crates/polars-arrow/src/array/binview/mod.rs	0.00%	2 Missing ⚠️
crates/polars-arrow/src/storage.rs	99.24%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #18666      +/-   ##
==========================================
- Coverage   79.94%   79.93%   -0.02%     
==========================================
  Files        1511     1511              
  Lines      203195   203212      +17     
  Branches     2891     2891              
==========================================
- Hits       162439   162431       -8     
- Misses      40206    40231      +25     
  Partials      550      550              

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