gh-90868: Adjust the Generated Objects (gh-99223)

We do the following:

* move the generated _PyUnicode_InitStaticStrings() to its own file
* move the generated _PyStaticObjects_CheckRefcnt() to its own file
* include pycore_global_objects.h in extension modules instead of pycore_runtime_init.h

These changes help us avoid including things that aren't needed.

https://github.com/python/cpython/issues/90868

Python/pylifecycle.c

@@ -10,6 +10,7 @@
 #include "pycore_fileutils.h"     // _Py_ResetForceASCII()
 #include "pycore_floatobject.h"   // _PyFloat_InitTypes()
 #include "pycore_genobject.h"     // _PyAsyncGen_Fini()
+#include "pycore_global_objects_fini_generated.h"  // "_PyStaticObjects_CheckRefcnt()
 #include "pycore_import.h"        // _PyImport_BootstrapImp()
 #include "pycore_initconfig.h"    // _PyStatus_OK()
 #include "pycore_list.h"          // _PyList_Fini()