GH-119866: Spill the stack around escaping calls. (GH-124392)

* Spill the evaluation around escaping calls in the generated interpreter and JIT. 

* The code generator tracks live, cached values so they can be saved to memory when needed.

* Spills the stack pointer around escaping calls, so that the exact stack is visible to the cycle GC.

Include/internal/pycore_ceval.h

@@ -251,6 +251,7 @@ typedef struct _special_method {
 } _Py_SpecialMethod;
 
 PyAPI_DATA(const _Py_SpecialMethod) _Py_SpecialMethods[];
+PyAPI_DATA(const size_t) _Py_FunctionAttributeOffsets[];
 
 PyAPI_FUNC(int) _PyEval_CheckExceptStarTypeValid(PyThreadState *tstate, PyObject* right);
 PyAPI_FUNC(int) _PyEval_CheckExceptTypeValid(PyThreadState *tstate, PyObject* right);
@@ -274,6 +275,8 @@ PyAPI_FUNC(PyObject *) _PyEval_GetANext(PyObject *aiter);
 PyAPI_FUNC(void) _PyEval_LoadGlobalStackRef(PyObject *globals, PyObject *builtins, PyObject *name, _PyStackRef *writeto);
 PyAPI_FUNC(PyObject *) _PyEval_GetAwaitable(PyObject *iterable, int oparg);
 PyAPI_FUNC(PyObject *) _PyEval_LoadName(PyThreadState *tstate, _PyInterpreterFrame *frame, PyObject *name);
+PyAPI_FUNC(int)
+_Py_Check_ArgsIterable(PyThreadState *tstate, PyObject *func, PyObject *args);
 
 /* Bits that can be set in PyThreadState.eval_breaker */
 #define _PY_GIL_DROP_REQUEST_BIT (1U << 0)