perf: Add a ray wait on metadatas when awaiting for tasks

[jaychia]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #3557 will degrade performances by 40.23%

_{Comparing jay/eager-ray-wait-metadata (a9c3e5d) with main (da6f499)}

Summary

⚡ 1 improvements
❌ 1 regressions
✅ 25 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	jay/eager-ray-wait-metadata	Change
⚡	test_count[1 Small File]	3.9 ms	3.5 ms	+10.81%
❌	test_iter_rows_first_row[100 Small Files]	187.7 ms	314 ms	-40.23%

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 77.79%. Comparing base (6ae4e77) to head (6adae15).

Files with missing lines	Patch %	Lines
daft/execution/execution_step.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3557   +/-   ##
=======================================
  Coverage   77.79%   77.79%           
=======================================
  Files         716      716           
  Lines       87770    87782   +12     
=======================================
+ Hits        68281    68293   +12     
  Misses      19489    19489           

Files with missing lines	Coverage Δ
daft/runners/ray_runner.py	82.19% <100.00%> (+0.16%)	⬆️
daft/execution/execution_step.py	89.38% <83.33%> (-0.07%)	⬇️

... and 1 file with indirect coverage changes