Fix ClientResponse.close releasing the connection instead of closing (#7869)

[bdraco]

(cherry picked from commit 25ef450)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3c63ca0) 97.34% compared to head (5a2db9b) 97.34%.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.10    #7874   +/-   ##
=======================================
  Coverage   97.34%   97.34%           
=======================================
  Files         108      108           
  Lines       32384    32407   +23     
  Branches     3839     3843    +4     
=======================================
+ Hits        31524    31547   +23     
  Misses        655      655           
  Partials      205      205           

Flag	Coverage Δ
CI-GHA	97.25% <100.00%> (+<0.01%)	⬆️
OS-Linux	96.94% <100.00%> (+<0.01%)	⬆️
OS-Windows	94.49% <100.00%> (+<0.01%)	⬆️
OS-macOS	96.60% <100.00%> (+<0.01%)	⬆️
Py-3.10.11	94.40% <100.00%> (+<0.01%)	⬆️
Py-3.10.13	96.78% <100.00%> (+<0.01%)	⬆️
Py-3.11.6	96.45% <100.00%> (+<0.01%)	⬆️
Py-3.8.10	94.38% <100.00%> (+<0.01%)	⬆️
Py-3.8.18	96.70% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	94.39% <100.00%> (+<0.01%)	⬆️
Py-3.9.18	96.76% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.13	96.21% <100.00%> (+<0.01%)	⬆️
VM-macos	96.60% <100.00%> (+<0.01%)	⬆️
VM-ubuntu	96.94% <100.00%> (+<0.01%)	⬆️
VM-windows	94.49% <100.00%> (+<0.01%)	⬆️

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