Enforce the use of `deprecated-removed` in docs

In the docs we have two directives that can be used to document deprecations: deprecated and deprecated-removed.

I think we should always prefer the latter:

• it will make it easier to track and document removals
• it will give people a target, so they can plan around it

Even if the removal version gets postponed, it's better to postpone than to say that something is deprecated and then just remove it at an unspecified time in the future.

Currently deprecated is more commonly used:

$ grep -r 'deprecated::' --include=*.rst | wc -l
226
$ grep -r 'deprecated-removed::' --include=*.rst | wc -l
30

• set removal version for deprecated features using deprecated-removed
• automate the documentation of deprecations (see also #92308)
• possibly deprecate the deprecated directive and replace it with deprecated-removed

まず、.rst ファイル全体で deprecated:: と deprecated-removed:: の文書化された grep 件数を再実行して確認し、その後 #92308 の関連作業を確認します。Issue のチェックリストは、完了するには削除バージョンを設定し、自動化を検討し、古いディレクティブを非推奨にするかどうかを決定する必要があることを示しています。