Extend `FOR_ITER` specializations to cover other indexable sequences

Currently, we specialize FOR_ITER for both tuple and list. We also handle tuple and lists specially in GET_ITER to support this specialization.

We should extend this specialization of iteration over sequences, using virtual iterators to bytes, str, bytesarray and others.
To do this, we should:

• Add a tp_getiteritem slots to PyTypeObject for sequences that can be efficiently indexed and cannot raise except for out-of-bounds access.
• Add a specialization of FOR_ITER for these classes.
• Specialize GET_ITER for:
  • iterators
  • indexable sequences (those classes with a tp_getiteritem slot)
• Specialize SEND for indexable sequences which should also improve JIT coverage, as unspecialized _SEND is currently a major cause of jit optimization failures.

Combined with https://github.com/python/cpython/issues/145667 this will allow effective specialization of a wider range of iterables and allow that specialization not only for for loops, but also for yield from loops.
It will add 3 instructions (4 new, 1 removed) which a reasonable

Linked PRs

• gh-145670
• gh-147967

Commencez par lire les spécialisations existantes de FOR_ITER et GET_ITER, puis examinez PyTypeObject et la spécialisation de SEND. Le travail est terminé lorsque les séquences indexables telles que bytes et str utilisent des itérateurs virtuels dans les boucles for et les boucles yield from, avec la couverture demandée des nouvelles instructions.