Add support for setting cookies for individual request

[perkfly]

What do these changes do?

support to add additional cookies per request when using aiohttp.ClientSession.request

Are there changes in behavior for the user?

User could now use cookies per request

Related issue number

#2387

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-io]

Codecov Report

Merging #3396 into master will decrease coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3396      +/-   ##
==========================================
- Coverage   98.01%   97.94%   -0.07%     
==========================================
  Files          44       44              
  Lines        8500     8511      +11     
  Branches     1377     1382       +5     
==========================================
+ Hits         8331     8336       +5     
- Misses         70       74       +4     
- Partials       99      101       +2

Impacted Files	Coverage Δ
aiohttp/tcp_helpers.py	90% <0%> (-6.67%)	⬇️
aiohttp/web_fileresponse.py	96.51% <0%> (-1.75%)	⬇️
aiohttp/client_reqrep.py	97.28% <0%> (-0.16%)	⬇️
aiohttp/streams.py	99.22% <0%> (+0.01%)	⬆️
aiohttp/web.py	98.97% <0%> (+0.05%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fcde126...75d0223. Read the comment docs.

[asvetlov]

Thanks for the contribution, @yifeikong !

[lock]

This thread has been automatically locked since there has not been
any recent activity after it was closed. Please open a new issue for
related bugs.

If you feel like there's important points made in this discussion,
please include those exceprts into that new issue.