gh-106581: Project through calls (#108067)

This finishes the work begun in gh-107760. When, while projecting a superblock, we encounter a call to a short, simple function, the superblock will now enter the function using `_PUSH_FRAME`, continue through it, and leave it using `_POP_FRAME`, and then continue through the original code. Multiple frame pushes and pops are even possible. It is also possible to stop appending to the superblock in the middle of a called function, when running out of space or encountering an unsupported bytecode.

Python/ceval_macros.h

@@ -369,3 +369,7 @@ static inline int _Py_EnterRecursivePy(PyThreadState *tstate) {
     return (tstate->py_recursion_remaining-- <= 0) &&
         _Py_CheckRecursiveCallPy(tstate);
 }
+
+static inline void _Py_LeaveRecursiveCallPy(PyThreadState *tstate)  {
+    tstate->py_recursion_remaining++;
+}