Improve section "Data Structures" in the tutorial

Documentation

The "More on Lists" subsection in the "Data Structures" section (Doc/tutorial/datastructures.rst) is the only place in the tutorial that contains formal definitions using Sphinx directives. They mostly duplicate descriptions in the library reference, and index entries refer to ones in the library reference, not in the tutorial. The list class is the only class whose methods are described so in the tutorial. The tutorial perhaps do not need such formal descriptions of all these methods. We could do like with other builtin functions and methods of other builtin classes, and simply add references to their real descriptions.

References to many methods of built classes did not work until recently. This might be one of reasons of exisiting such section.

This was discussed in https://discuss.python.org/t/a-small-typo-on-5-1-more-on-lists-section/106150. cc @nedbat

Doc/tutorial/datastructures.rst とその "More on Lists" サブセクションから始め、続いて正式なメソッドの説明をライブラリリファレンス側の対応する説明と比較してください。文脈を把握するために最近の議論を確認してください。チュートリアルが不要な重複定義を避けつつ、実際の説明への有効な参照を維持できていれば完了です。