gh-85283: Add PySys_Audit() to the limited C API (#108571)

The PySys_Audit() function was added in Python 3.8 by the PEP 578
"Python Runtime Audit Hooks".

Add also PySys_AuditTuple() to the limited C API, function added
to Python 3.13.

Move non-limited "PerfMap" C API from Include/sysmodule.h to
Include/cpython/sysmodule.h.