gh-132775: Fix Interpreter.call() __main__ Visibility (gh-135595)

As noted in the new tests, there are a few situations we must carefully accommodate
for functions that get pickled during interp.call().  We do so by running the script
from the main interpreter's __main__ module in a hidden module in the other
interpreter.  That hidden module is used as the function __globals__.

Modules/_interpretersmodule.c

@@ -601,6 +601,7 @@ _make_call(struct interp_call *call,
         unwrap_not_shareable(tstate, failure);
         return -1;
     }
+    assert(!_PyErr_Occurred(tstate));
 
     // Make the call.
     PyObject *resobj = PyObject_Call(func, args, kwargs);