[FEAT] IO Morsel Size

[colin-ho]

Change morsel size for IO (url download / upload) to be small. Users can still change it up by setting morsel_size in the execution config.

Todos:

• Ideally I'd like users to be able to configure morsel size at a per-op level, but that will likely be a more involved API change.

[codspeed-hq]

CodSpeed Performance Report

Merging #3004 will not alter performance

_{Comparing colin/morsel-size (753ac24) with main (73ff3f3)}

Summary

✅ 17 untouched benchmarks

[codecov]

Codecov Report

Attention: Patch coverage is 90.24390% with 4 lines in your changes missing coverage. Please review.

Project coverage is 78.52%. Comparing base (73ff3f3) to head (753ac24).
Report is 32 commits behind head on main.

Files with missing lines	Patch %	Lines
src/common/daft-config/src/python.rs	40.00%	3 Missing ⚠️
...-execution/src/intermediate_ops/intermediate_op.rs	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3004      +/-   ##
==========================================
+ Coverage   78.14%   78.52%   +0.37%     
==========================================
  Files         610      610              
  Lines       72146    71769     -377     
==========================================
- Hits        56381    56354      -27     
+ Misses      15765    15415     -350     

Files with missing lines	Coverage Δ
daft/context.py	79.48% <ø> (ø)
src/common/daft-config/src/lib.rs	87.50% <100.00%> (ø)
src/daft-dsl/src/expr/mod.rs	75.66% <100.00%> (+0.10%)	⬆️
src/daft-dsl/src/functions/scalar.rs	94.00% <100.00%> (+0.81%)	⬆️
src/daft-dsl/src/lib.rs	100.00% <ø> (ø)
src/daft-functions/src/uri/download.rs	83.84% <100.00%> (+0.38%)	⬆️
src/daft-functions/src/uri/upload.rs	65.26% <100.00%> (+0.63%)	⬆️
...ft-local-execution/src/intermediate_ops/project.rs	100.00% <100.00%> (ø)
src/daft-local-execution/src/lib.rs	89.74% <100.00%> (ø)
src/daft-local-execution/src/run.rs	89.84% <100.00%> (ø)
... and 2 more

... and 16 files with indirect coverage changes

[samster25]

Hold off until everything else is merged.

We are thinking about updating url_download to it's own logical node rather than keep it as a pure expression in projection.