[3.10] Restore the ability to create objects without a running event loop

[bdraco]

Alternate solution for #8555, partial revert of #8512 (originally #5278)

I'm not sold on that idea because Python has deprecated calling asyncio.get_event_loop() without a running event loop. After all, the behavior is confusing. Even if we did revert this, it's kicking the can down the road until it becomes an error.

https://docs.python.org/3/library/asyncio-eventloop.html#asyncio.get_event_loop

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.59%. Comparing base (9ed3841) to head (63811fa).
Report is 196 commits behind head on 3.10.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.10    #8580   +/-   ##
=======================================
  Coverage   97.59%   97.59%           
=======================================
  Files         108      108           
  Lines       33674    33702   +28     
  Branches     4038     4042    +4     
=======================================
+ Hits        32865    32893   +28     
  Misses        590      590           
  Partials      219      219           

Flag	Coverage Δ
CI-GHA	97.50% <100.00%> (+<0.01%)	⬆️
OS-Linux	97.17% <100.00%> (+<0.01%)	⬆️
OS-Windows	94.71% <100.00%> (+<0.01%)	⬆️
OS-macOS	96.84% <100.00%> (+<0.01%)	⬆️
Py-3.10.11	96.94% <100.00%> (+<0.01%)	⬆️
Py-3.10.14	96.90% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	97.13% <100.00%> (+<0.01%)	⬆️
Py-3.12.4	97.25% <100.00%> (+<0.01%)	⬆️
Py-3.8.10	94.44% <100.00%> (+<0.01%)	⬆️
Py-3.8.18	96.79% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	96.94% <100.00%> (+<0.01%)	⬆️
Py-3.9.19	96.91% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.16	96.47% <100.00%> (-0.01%)	⬇️
VM-macos	96.84% <100.00%> (+<0.01%)	⬆️
VM-ubuntu	97.17% <100.00%> (+<0.01%)	⬆️
VM-windows	94.71% <100.00%> (+<0.01%)	⬆️

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