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/Objects/dictobject.c b/Objects/dictobject.c
index 08ec9e2..ca383a1 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -111,7 +111,7 @@
 #define PyDict_MINSIZE 8
 
 #include "Python.h"
-#include "pycore_state.h"
+#include "pycore_pystate.h"
 #include "dict-common.h"
 #include "stringlib/eq.h"    /* to get unicode_eq() */