Minor bug fix in servers

[francis-clairicia]

• Added typing.NoReturn to serve_forever() methods
• Fixed logs with exc_info=True due to a regression in Python 3.11.5
• Fixed a bug in easynetwork_asyncio.tasks.CancelScope at context exit if there was a delayed cancellation to be scheduled for a parent scope

[codecov]

Codecov Report

Merging #130 (ebbfc0a) into main (c58962b) will not change coverage.
The diff coverage is 100.00%.

Flag	Coverage Δ
OS-Linux	88.08% <100.00%> (-0.02%)	⬇️
OS-Windows	87.99% <100.00%> (-0.02%)	⬇️
OS-macOS	88.10% <100.00%> (-0.02%)	⬇️
Py-3.11	99.89% <100.00%> (-0.01%)	⬇️
test-functional	88.26% <100.00%> (-0.02%)	⬇️
test-unit	77.30% <18.36%> (+0.13%)	⬆️

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