[issue35886] Move PyInterpreterState into Include/internal/pycore_pystate.h

[Eric Snow]

Change by Eric Snow <ericsnowcurrently at gmail.com>:


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keywords: +patch, patch
pull_requests: +11623, 11624
stage: needs patch -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35886>
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