Revert "Use the system allocator for codspeed benchmarks"

[MichaReiser]

Reverts #13005

I don't see any improvements. I think it's even worse then before.

[codspeed-hq]

CodSpeed Performance Report

Merging #13035 will degrade performances by 9.74%

_{Comparing revert-13005-use-system-allocator-for-codspeed (f7103b7) with main (ecd9e6a)}

Summary

⚡ 9 improvements
❌ 1 (👁 1) regressions
✅ 22 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	revert-13005-use-system-allocator-for-codspeed	Change
⚡	linter/default-rules[large/dataset.py]	3.9 ms	3.7 ms	+5.62%
👁	linter/default-rules[numpy/globals.py]	170.5 µs	189 µs	-9.74%
⚡	linter/default-rules[pydantic/types.py]	1.9 ms	1.8 ms	+5.57%
⚡	linter/all-with-preview-rules[pydantic/types.py]	10.2 ms	9.7 ms	+5.16%
⚡	linter/all-with-preview-rules[unicode/pypinyin.py]	2.5 ms	2.4 ms	+4.48%
⚡	parser[large/dataset.py]	5.6 ms	4.9 ms	+12.86%
⚡	parser[numpy/ctypeslib.py]	998.5 µs	910.7 µs	+9.64%
⚡	parser[numpy/globals.py]	112.7 µs	101.6 µs	+10.95%
⚡	parser[pydantic/types.py]	2.1 ms	2 ms	+6.73%
⚡	parser[unicode/pypinyin.py]	350.6 µs	308.9 µs	+13.5%

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.