[Draft] Refactor web-socket heartbeat mechanism

[atemate]

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-io]

Codecov Report

Merging #4000 into master will decrease coverage by 3.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #4000      +/-   ##
==========================================
- Coverage    97.8%   94.79%   -3.02%     
==========================================
  Files          43       43              
  Lines        8763     8764       +1     
  Branches     1375     1375              
==========================================
- Hits         8571     8308     -263     
- Misses         80      345     +265     
+ Partials      112      111       -1

Impacted Files	Coverage Δ
aiohttp/http_websocket.py	98.63% <100%> (ø)	⬆️
aiohttp/worker.py	6.72% <0%> (-90.76%)	⬇️
aiohttp/resolver.py	45.61% <0%> (-54.39%)	⬇️
aiohttp/web_fileresponse.py	67.04% <0%> (-30.69%)	⬇️
aiohttp/tcp_helpers.py	66.66% <0%> (-26.67%)	⬇️
aiohttp/locks.py	92.85% <0%> (-7.15%)	⬇️
aiohttp/web_runner.py	92.47% <0%> (-5.31%)	⬇️
aiohttp/http_parser.py	92.39% <0%> (-4.7%)	⬇️
aiohttp/http_writer.py	95.28% <0%> (-3.78%)	⬇️
aiohttp/test_utils.py	97.7% <0%> (-1.97%)	⬇️
... and 5 more

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[lgtm-com]

This pull request introduces 1 alert when merging ccf2437 into 8691ca2 - view on LGTM.com

new alerts:

• 1 for Wrong name for an argument in a call

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[Dreamsorcerer]

I suspect this has been superseded by @bdraco's work and appears abandoned anyway (there's no description or anything to even suggest the purpose).