[Doc] Remove unnecessary quotes from typing module (#137207)

* gh-106320: Remove private _PyInterpreterState functions (#106335)

Remove private _PyThreadState and _PyInterpreterState C API
functions: move them to the internal C API (pycore_pystate.h and
pycore_interp.h). Don't export most of these functions anymore, but
still export functions used by tests.

Remove _PyThreadState_Prealloc() and _PyThreadState_Init() from the C
API, but keep it in the stable API.

* Doc: minor change

* Revert "Doc: minor change"

This reverts commit ebfa0937c2caf0110ab1540f14956d56fe925092.

* [Doc] Remove unnecessary quotes from typing (See Also section)

* [Doc] Remove unnecessary quotes from typing

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Co-authored-by: Victor Stinner <vstinner@python.org>