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.

Python/ceval_macros.h

@@ -108,6 +108,7 @@ do { \
 /* Do interpreter dispatch accounting for tracing and instrumentation */
 #define DISPATCH() \
     { \
+        assert(frame->stackpointer == NULL); \
         NEXTOPARG(); \
         PRE_DISPATCH_GOTO(); \
         DISPATCH_GOTO(); \