gh-87390: Fix starred tuple equality and pickling (GH-92337)

Include/internal/pycore_global_strings.h

@@ -300,6 +300,7 @@ struct _Py_global_strings {
         STRUCT_FOR_ID(n_unnamed_fields)
         STRUCT_FOR_ID(name)
         STRUCT_FOR_ID(newlines)
+        STRUCT_FOR_ID(next)
         STRUCT_FOR_ID(obj)
         STRUCT_FOR_ID(offset)
         STRUCT_FOR_ID(onceregistry)

Include/internal/pycore_runtime_init.h

@@ -923,6 +923,7 @@ extern "C" {
                 INIT_ID(n_unnamed_fields), \
                 INIT_ID(name), \
                 INIT_ID(newlines), \
+                INIT_ID(next), \
                 INIT_ID(obj), \
                 INIT_ID(offset), \
                 INIT_ID(onceregistry), \