refactor: Extract zlib-related logic into a single module (#7223)

[Dreamsorcerer]

Backport #7223

Addresses issue #7192 Refactors the logic to have the zlib-related stuff concentrated into a single module

No

#7192

• 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
  • name it <issue_id>.<type> for example (588.bugfix)

• if you don't have an issue_id change it to the pr id after creating the pr
  • ensure type is one of the following: * .feature: Signifying a new feature. * .bugfix: Signifying a bug fix. * .doc: Signifying a documentation improvement. * .removal: Signifying a deprecation or removal of public API.
• .misc: A ticket has been closed, but it is not of interest to users.
• Make sure to use full sentences with correct case and punctuation, for example: "Fix issue with non-ascii contents in doctest text files."

---

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Sam Bull aa6bs0@sambull.org
(cherry picked from commit 3ff81dc)

What do these changes do?

Are there changes in behavior for the user?

Related issue number

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
  • name it <issue_id>.<type> for example (588.bugfix)
  • if you don't have an issue_id change it to the pr id after creating the pr
  • ensure type is one of the following:
    • .feature: Signifying a new feature.
    • .bugfix: Signifying a bug fix.
    • .doc: Signifying a documentation improvement.
    • .removal: Signifying a deprecation or removal of public API.
    • .misc: A ticket has been closed, but it is not of interest to users.
  • Make sure to use full sentences with correct case and punctuation, for example: "Fix issue with non-ascii contents in doctest text files."

[codecov]

Codecov Report

Merging #7250 (728b5c7) into 3.9 (43e568b) will decrease coverage by 0.03%.
The diff coverage is 88.46%.

@@            Coverage Diff             @@
##              3.9    #7250      +/-   ##
==========================================
- Coverage   97.34%   97.32%   -0.03%     
==========================================
  Files         107      108       +1     
  Lines       31490    31587      +97     
  Branches     3977     4012      +35     
==========================================
+ Hits        30654    30741      +87     
- Misses        634      640       +6     
- Partials      202      206       +4     

Flag	Coverage Δ
CI-GHA	97.22% <88.46%> (-0.03%)	⬇️
OS-Linux	96.88% <88.46%> (-0.03%)	⬇️
OS-Windows	94.48% <88.46%> (-0.02%)	⬇️
OS-macOS	96.46% <88.46%> (-0.03%)	⬇️
Py-3.10.10	96.95% <88.46%> (-0.03%)	⬇️
Py-3.11.0	96.39% <88.46%> (-0.03%)	⬇️
Py-3.7.16	96.69% <88.46%> (-0.03%)	⬇️
Py-3.7.9	94.33% <88.46%> (-0.02%)	⬇️
Py-3.8.10	94.26% <88.46%> (-0.02%)	⬇️
Py-3.8.16	96.60% <88.46%> (-0.03%)	⬇️
Py-3.9.13	94.27% <88.46%> (-0.02%)	⬇️
Py-3.9.16	96.63% <88.46%> (-0.03%)	⬇️
Py-pypy7.3.11	94.03% <85.57%> (-0.05%)	⬇️
VM-macos	96.46% <88.46%> (-0.03%)	⬇️
VM-ubuntu	96.88% <88.46%> (-0.03%)	⬇️
VM-windows	94.48% <88.46%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
aiohttp/client_reqrep.py	97.84% <ø> (+0.01%)	⬆️
aiohttp/web_response.py	98.11% <75.00%> (-0.45%)	⬇️
aiohttp/compression_utils.py	84.61% <84.61%> (ø)
aiohttp/http_parser.py	98.29% <100.00%> (+0.78%)	⬆️
aiohttp/http_websocket.py	99.22% <100.00%> (+<0.01%)	⬆️
aiohttp/http_writer.py	99.15% <100.00%> (ø)
aiohttp/multipart.py	96.80% <100.00%> (-0.02%)	⬇️
tests/test_http_parser.py	99.08% <100.00%> (ø)

... and 5 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more