[PR #8042/4b91b530 backport][3.9] Tightening the runtime type check for ssl (#7698)

[patchback]

This is a backport of PR #8042 as merged into 3.10 (4b91b53).

Currently, the valid types of ssl parameter are SSLContext, Literal[False], Fingerprint or None.

If user sets ssl = False, we disable ssl certificate validation which makes total sense. But if user set ssl = True by mistake, instead of enabling ssl certificate validation or raising errors, we silently disable the validation too which is a little subtle but weird.

In this PR, we added a check that if user sets ssl=True, we enable certificate validation by treating it as using Default SSL Context.

---

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Sviatoslav Sydorenko wk.cvs.github@sydorenko.org.ua
Co-authored-by: Sam Bull aa6bs0@sambull.org
Co-authored-by: J. Nick Koston nick@koston.org
Co-authored-by: Sam Bull git@sambull.org
(cherry picked from commit 9e14ea1)

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[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (f000174) 97.39% compared to head (8dcf936) 97.38%.

Files	Patch %	Lines
aiohttp/client.py	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              3.9    #8043      +/-   ##
==========================================
- Coverage   97.39%   97.38%   -0.01%     
==========================================
  Files         108      108              
  Lines       32496    32498       +2     
  Branches     3848     3849       +1     
==========================================
  Hits        31648    31648              
- Misses        646      647       +1     
- Partials      202      203       +1     

Flag	Coverage Δ
CI-GHA	97.29% <92.30%> (-0.01%)	⬇️
OS-Linux	96.98% <92.30%> (-0.01%)	⬇️
OS-Windows	94.47% <100.00%> (ø)
OS-macOS	96.80% <92.30%> (+0.19%)	⬆️
Py-3.10.11	94.37% <100.00%> (ø)
Py-3.10.13	96.77% <92.30%> (+<0.01%)	⬆️
Py-3.11.7	96.49% <92.30%> (-0.01%)	⬇️
Py-3.12.1	96.42% <92.30%> (-0.13%)	⬇️
Py-3.8.10	94.35% <100.00%> (ø)
Py-3.8.18	96.70% <92.30%> (-0.01%)	⬇️
Py-3.9.13	94.36% <100.00%> (ø)
Py-3.9.18	96.74% <92.30%> (-0.01%)	⬇️
Py-pypy7.3.15	96.29% <92.30%> (-0.01%)	⬇️
VM-macos	96.80% <92.30%> (+0.19%)	⬆️
VM-ubuntu	96.98% <92.30%> (-0.01%)	⬇️
VM-windows	94.47% <100.00%> (ø)

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