Add client Brotli support (#5227)

[ddelange]

(cherry picked from commit 28ea32d)

backport ref #5227 (comment)

[codecov]

Codecov Report

Merging #7100 (f5df67a) into 3.9 (640bb1e) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              3.9    #7100      +/-   ##
==========================================
- Coverage   97.31%   97.31%   -0.01%     
==========================================
  Files         103      103              
  Lines       30265    30257       -8     
  Branches     3763     3766       +3     
==========================================
- Hits        29452    29444       -8     
  Misses        618      618              
  Partials      195      195              

Flag	Coverage Δ
CI-GHA	97.20% <100.00%> (-0.01%)	⬇️
OS-Linux	96.86% <100.00%> (-0.01%)	⬇️
OS-Windows	94.32% <100.00%> (-0.01%)	⬇️
OS-macOS	96.43% <100.00%> (-0.01%)	⬇️
Py-3.10.8	96.91% <100.00%> (-0.01%)	⬇️
Py-3.11.0	96.33% <100.00%> (-0.01%)	⬇️
Py-3.7.15	96.67% <100.00%> (-0.01%)	⬇️
Py-3.7.9	94.18% <100.00%> (-0.01%)	⬇️
Py-3.8.10	94.10% <100.00%> (-0.01%)	⬇️
Py-3.8.14	96.58% <100.00%> (-0.01%)	⬇️
Py-3.9.13	94.10% <100.00%> (-0.01%)	⬇️
Py-3.9.14	96.33% <100.00%> (-0.01%)	⬇️
Py-3.9.15	96.57% <100.00%> (-0.01%)	⬇️
Py-pypy7.3.9	96.18% <100.00%> (+<0.01%)	⬆️
VM-macos	96.43% <100.00%> (-0.01%)	⬇️
VM-ubuntu	96.86% <100.00%> (-0.01%)	⬇️
VM-windows	94.32% <100.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
aiohttp/client_reqrep.py	97.52% <100.00%> (+0.01%)	⬆️
tests/test_client_request.py	99.60% <100.00%> (+<0.01%)	⬆️
tests/test_web_functional.py	98.09% <100.00%> (-0.02%)	⬇️

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[ddelange]

E       AssertionError: assert '1.0.0.0.0.0.....0.0.ip6.arpa' == 'Mac-1669312225691.local'
E         - Mac-1669312225691.local
E         + 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa

ref https://github.com/aio-libs/aiohttp/actions/runs/3542772584/jobs/5948622150#step:10:402

hmm, is this related to this PR? 🤔