[BUG] Re-raise exceptions in rayrunner

[jaychia]

Previously prior to this change, if an error occurs during execution in the RayRunner:

1. The "run_plan" thread will error out and die before sending any information on the return queue
2. The Scheduler actor will block forever on the next result on the return queue via a .get()

This change re-raises those errors so that it surfaces in the scheduler, and prevents that issue from occurring.

[codecov]

Codecov Report

Merging #1522 (00ed979) into main (ea7167b) will decrease coverage by 0.03%.
Report is 1 commits behind head on main.
The diff coverage is 33.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1522      +/-   ##
==========================================
- Coverage   74.76%   74.73%   -0.03%     
==========================================
  Files          60       60              
  Lines        6130     6140      +10     
==========================================
+ Hits         4583     4589       +6     
- Misses       1547     1551       +4     

Files	Coverage Δ
daft/runners/ray_runner.py	90.55% <33.33%> (-0.94%)	⬇️

... and 1 file with indirect coverage changes