[FEAT] Add ability for RayRunner to run actor pool projects (beta feature)

[jaychia]

Added tests from 675b0b1

[codspeed-hq]

CodSpeed Performance Report

Merging #2881 will not alter performance

_{Comparing jay/ray-apps (f761629) with main (05eeffb)}

Summary

✅ 17 untouched benchmarks

[codecov]

Codecov Report

Attention: Patch coverage is 45.33333% with 41 lines in your changes missing coverage. Please review.

Project coverage is 66.49%. Comparing base (b0f31e3) to head (f761629).
Report is 16 commits behind head on main.

Files with missing lines	Patch %	Lines
daft/runners/ray_runner.py	47.22%	38 Missing ⚠️
daft/execution/physical_plan.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2881      +/-   ##
==========================================
+ Coverage   65.26%   66.49%   +1.23%     
==========================================
  Files         999     1005       +6     
  Lines      117521   114357    -3164     
==========================================
- Hits        76695    76037     -658     
+ Misses      40826    38320    -2506     

Flag	Coverage Δ
	66.49% <45.33%> (+1.23%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
daft/udf.py	94.50% <ø> (ø)
daft/execution/physical_plan.py	89.02% <0.00%> (-0.28%)	⬇️
daft/runners/ray_runner.py	75.71% <47.22%> (-3.44%)	⬇️

... and 154 files with indirect coverage changes

[kevinzwang]

Took a quick look at it, need to take some more time to dive into the details but should not introduce any regressions on existing behavior, so approving merge under the actor pool feature flag