[PR #10156/00700458 backport][3.12] Add ALPN extension to client SSL Context

[patchback]

This is a backport of PR #10156 as merged into master (0070045).

What do these changes do?

Add "http/1.1" ALPN extension to aiohttp client's SSL Context.

Are there changes in behavior for the user?

Is it a substantial burden for the maintainers to support this?

Related issue number

Fixes #10152

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• If you provide code modification, please add yourself to CONTRIBUTORS.txt
  • The format is <Name> <Surname>.
  • Please keep alphabetical order, the file is sorted by names.
• Add a new news fragment into the CHANGES/ folder

[codspeed-hq]

CodSpeed Performance Report

Merging #10164 will not alter performance

_{Comparing patchback/backports/3.12/00700458eb7741f15861a8616dbf77a0d82dc31f/pr-10156 (3e4591f) with 3.12 (5d9d830)}

Summary

✅ 47 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.06%. Comparing base (5d9d830) to head (3e4591f).
Report is 2 commits behind head on 3.12.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.12   #10164   +/-   ##
=======================================
  Coverage   98.06%   98.06%           
=======================================
  Files         123      123           
  Lines       37139    37155   +16     
  Branches     4468     4468           
=======================================
+ Hits        36419    36435   +16     
  Misses        542      542           
  Partials      178      178           

Flag	Coverage Δ
CI-GHA	97.95% <100.00%> (+<0.01%)	⬆️
OS-Linux	97.65% <100.00%> (+<0.01%)	⬆️
OS-Windows	94.57% <100.00%> (+<0.01%)	⬆️
OS-macOS	96.77% <100.00%> (+<0.01%)	⬆️
Py-3.10.11	96.62% <100.00%> (+<0.01%)	⬆️
Py-3.10.15	97.21% <100.00%> (+0.04%)	⬆️
Py-3.11.10	97.23% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	96.69% <100.00%> (-0.01%)	⬇️
Py-3.12.7	97.44% <100.00%> (-0.27%)	⬇️
Py-3.12.8	94.36% <100.00%> (?)
Py-3.13.0	96.55% <100.00%> (+<0.01%)	⬆️
Py-3.13.1	97.67% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	96.55% <100.00%> (+<0.01%)	⬆️
Py-3.9.20	97.13% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.16	96.69% <100.00%> (+<0.01%)	⬆️
VM-macos	96.77% <100.00%> (+<0.01%)	⬆️
VM-ubuntu	97.65% <100.00%> (+<0.01%)	⬆️
VM-windows	94.57% <100.00%> (+<0.01%)	⬆️

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