RNA: Fully clear data in RNA_POINTER_INVALIDATE.

Not really sure why only type and owner_id were cleared here?
Especially when code like `pyrna_struct_CreatePyObject` would check
for both `data` and `type` to be null to consider the pointer as None...

Happens to 'fix' #134311, since now cleared PointerRNA are 'just'
reset to `PointerRNA_NULL`. Would not work if the data was not an
ID PointerRNA though...

NOTE: In general, what is considered an invalid PointerRNA is still very
loosely designed in our code-base, we'll have to address this.

Pull Request: https://projects.blender.org/blender/blender/pulls/134393

source/blender/makesrna/RNA_access.hh

@@ -813,9 +813,7 @@ StructRNA *ID_code_to_RNA_type(short idcode);
 
 #define RNA_POINTER_INVALIDATE(ptr) \
   { \
-    /* this is checked for validity */ \
-    (ptr)->type = NULL; /* should not be needed but prevent bad pointer access, just in case */ \
-    (ptr)->owner_id = NULL; \
+    *(ptr) = PointerRNA_NULL; \
   } \
   (void)0