Add benchmark for streaming API iter_chunks

[bdraco]

Benchmark to demo the benefit of iter_chunks over read

Most of the time is spent in getting the data from llhttp into python objects, but its still significantly faster to use iter_chunks vs read because it avoids another copy.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.76%. Comparing base (0d44b6a) to head (bb24ebd).
Report is 1 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #10426   +/-   ##
=======================================
  Coverage   98.76%   98.76%           
=======================================
  Files         122      122           
  Lines       37116    37135   +19     
  Branches     2044     2046    +2     
=======================================
+ Hits        36656    36675   +19     
  Misses        320      320           
  Partials      140      140           

Flag	Coverage Δ
CI-GHA	98.65% <100.00%> (+<0.01%)	⬆️
OS-Linux	98.33% <100.00%> (+<0.01%)	⬆️
OS-Windows	96.25% <100.00%> (+<0.01%)	⬆️
OS-macOS	97.45% <100.00%> (+<0.01%)	⬆️
Py-3.10.11	97.33% <100.00%> (+<0.01%)	⬆️
Py-3.10.16	97.91% <100.00%> (+<0.01%)	⬆️
Py-3.11.11	97.99% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	97.43% <100.00%> (+<0.01%)	⬆️
Py-3.12.8	98.43% <100.00%> (+<0.01%)	⬆️
Py-3.13.1	98.41% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	97.23% <94.73%> (-0.01%)	⬇️
Py-3.9.21	97.79% <94.73%> (-0.01%)	⬇️
Py-pypy7.3.16	97.37% <100.00%> (+<0.01%)	⬆️
VM-macos	97.45% <100.00%> (+<0.01%)	⬆️
VM-ubuntu	98.33% <100.00%> (+<0.01%)	⬆️
VM-windows	96.25% <100.00%> (+<0.01%)	⬆️

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[codspeed-hq]

CodSpeed Performance Report

Merging #10426 will not alter performance

_{Comparing iter_chunks (bb24ebd) with master (0d44b6a)}

Summary

✅ 47 untouched benchmarks
🆕 1 new benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
🆕	test_one_hundred_get_requests_iter_chunks_on_512kib_chunked_payload[pyloop]	N/A	108.1 ms	N/A

[patchback]

Backport to 3.11: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.11/fae142f59841d64eb57bed189397f9baca0c44a6/pr-10426

Backported as #10427

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.

[patchback]

Backport to 3.12: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.12/fae142f59841d64eb57bed189397f9baca0c44a6/pr-10426

Backported as #10428

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.