bpo-35081: Rename internal headers (GH-10275)

Rename Include/internal/ headers:

* pycore_hash.h -> pycore_pyhash.h
* pycore_lifecycle.h -> pycore_pylifecycle.h
* pycore_mem.h -> pycore_pymem.h
* pycore_state.h -> pycore_pystate.h

Add missing headers to Makefile.pre.in and PCbuild:

* pycore_condvar.h.
* pycore_hamt.h
* pycore_pyhash.h
diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index 24ae963..e1e45dc 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -9,7 +9,7 @@
 
 #define PY_SSIZE_T_CLEAN
 #include "Python.h"
-#include "pycore_state.h"
+#include "pycore_pystate.h"
 #include "structmember.h"
 #include "pythread.h"
 #include "_iomodule.h"