[issue22117] Rewrite pytime.h to work on nanoseconds

[Roundup Robot]

Roundup Robot added the comment:

New changeset b0b4c4d365b1 by Victor Stinner in branch 'default':
Issue #22117: Fix test_gdb for the new time.sleep()
https://hg.python.org/cpython/rev/b0b4c4d365b1

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22117>
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