[BUG] Terminate nodes instead of stopping them

[raunakab]

Overview

Nodes were being stopped and saved for future re-use purposes. This PR turns off caching by settings cache_stopped_nodes to false. This tells ray to shut down the nodes when ray down ... is invoked.

[codspeed-hq]

CodSpeed Performance Report

Merging #3427 will improve performances by 11.99%

_{Comparing bug/terminate-nodes (a318ca5) with main (fa1d9d7)}

Summary

⚡ 1 improvements
✅ 16 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	bug/terminate-nodes	Change
⚡	test_iter_rows_first_row[100 Small Files]	364.1 ms	325.1 ms	+11.99%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.46%. Comparing base (fa1d9d7) to head (a318ca5).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3427      +/-   ##
==========================================
- Coverage   77.35%   76.46%   -0.90%     
==========================================
  Files         684      684              
  Lines       83637    85410    +1773     
==========================================
+ Hits        64694    65305     +611     
- Misses      18943    20105    +1162     

see 19 files with indirect coverage changes