This is the first of several precursors to storing tp_subclasses (and tp_weaklist) on the interpreter state for static builtin types.

We do the following:

• add _PyStaticType_InitBuiltin()
• add _Py_TPFLAGS_STATIC_BUILTIN
• set it on all static builtin types in _PyStaticType_InitBuiltin()
• shuffle some code around to be able to use _PyStaticType_InitBuiltin()
  • rename _PyStructSequence_InitType() to _PyStructSequence_InitBuiltinWithFlags()
  • add _PyStructSequence_InitBuiltin().

• Issue: [subinterpreters] Static types incorrectly share some objects between interpreters #94673