[issue45819] Avoid releasing the GIL in nonblocking socket operations

[Jim Crist-Harif]

Change by Jim Crist-Harif <jcristharif at gmail.com>:


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components: +asyncio -C API
nosy: +asvetlov, yselivanov

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45819>
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