[PR #10884/d758b7ae backport][3.12] Fix flakey middleware connection reuse test

[patchback]

This is a backport of PR #10884 as merged into master (d758b7a).

This test needs to explicitly release the response so the connection can get released to avoid the race.

[codspeed-hq]

CodSpeed Performance Report

Merging #10887 will improve performances by 20.69%

_{Comparing patchback/backports/3.12/d758b7aefb2a418af2a1d3f6d271405ace0d6c14/pr-10884 (4487d23) with 3.12 (5044d53)}

Summary

⚡ 13 improvements
✅ 47 untouched benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	test_resolve_dynamic_resource_url_with_many_dynamic_routes[pyloop]	4 ms	3.5 ms	+11.9%
⚡	test_resolve_dynamic_resource_url_with_many_dynamic_routes_with_common_prefix[pyloop]	297.3 ms	246.3 ms	+20.69%
⚡	test_resolve_dynamic_resource_url_with_many_static_routes[pyloop]	4 ms	3.6 ms	+12.42%
⚡	test_resolve_gitapi[pyloop]	343.1 ms	294.3 ms	+16.59%
⚡	test_resolve_gitapi_root[pyloop]	2.4 ms	2 ms	+20.64%
⚡	test_resolve_gitapi_subapps[pyloop]	344.1 ms	295 ms	+16.66%
⚡	test_resolve_multiple_fixed_url_with_many_routes[pyloop]	2.6 ms	2.2 ms	+18.83%
⚡	test_resolve_multiple_level_fixed_url_with_many_routes[pyloop]	10.2 ms	8.5 ms	+19.08%
⚡	test_resolve_prefix_resources_many_prefix_many_plain[pyloop]	5.6 ms	4.9 ms	+13.7%
⚡	test_resolve_root_route[pyloop]	1,041.6 µs	877.1 µs	+18.76%
⚡	test_resolve_root_route_with_many_fixed_routes[pyloop]	1,045.4 µs	877.7 µs	+19.11%
⚡	test_resolve_single_fixed_url_with_many_routes[pyloop]	1,044.8 µs	883 µs	+18.33%
⚡	test_resolve_static_root_route[pyloop]	1,141.6 µs	975.5 µs	+17.03%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.13%. Comparing base (5044d53) to head (4487d23).
Report is 1 commits behind head on 3.12.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.12   #10887   +/-   ##
=======================================
  Coverage   98.13%   98.13%           
=======================================
  Files         128      128           
  Lines       38684    38685    +1     
  Branches     2177     2177           
=======================================
+ Hits        37963    37964    +1     
  Misses        551      551           
  Partials      170      170           

Flag	Coverage Δ
CI-GHA	98.02% <100.00%> (+<0.01%)	⬆️
OS-Linux	97.75% <100.00%> (+<0.01%)	⬆️
OS-Windows	95.20% <100.00%> (+<0.01%)	⬆️
OS-macOS	96.90% <100.00%> (-0.01%)	⬇️
Py-3.10.11	96.78% <100.00%> (+<0.01%)	⬆️
Py-3.10.17	97.30% <100.00%> (-0.04%)	⬇️
Py-3.11.12	97.44% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	96.88% <100.00%> (-0.01%)	⬇️
Py-3.12.10	97.81% <100.00%> (+<0.01%)	⬆️
Py-3.13.3	97.81% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	96.67% <100.00%> (+<0.01%)	⬆️
Py-3.9.22	97.21% <100.00%> (+0.02%)	⬆️
Py-pypy7.3.16	83.35% <100.00%> (-4.15%)	⬇️
VM-macos	96.90% <100.00%> (-0.01%)	⬇️
VM-ubuntu	97.75% <100.00%> (+<0.01%)	⬆️
VM-windows	95.20% <100.00%> (+<0.01%)	⬆️

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