feat: Always end with a in-memory sink on collect

[ritchie46]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #16928 will degrade performances by 21.14%

_{Comparing sink (2e81070) with main (9914d96)}

Summary

❌ 1 regressions
✅ 36 untouched benchmarks

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

Benchmarks breakdown

	Benchmark	main	sink	Change
❌	test_groupby_h2oai_q3	2.4 ms	3.1 ms	-21.14%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.10%. Comparing base (9914d96) to head (2e81070).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16928      +/-   ##
==========================================
- Coverage   81.10%   81.10%   -0.01%     
==========================================
  Files        1435     1435              
  Lines      189555   189560       +5     
  Branches     2712     2712              
==========================================
+ Hits       153734   153738       +4     
- Misses      35321    35322       +1     
  Partials      500      500              

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