Auto generate pyright test config

Take the information which stubs to exclude from the METADATA.toml files. On one hand this is necessary for #10722, i.e. to correctly handle requires_python, on the other hand this allows us to move a "stub incomplete" marker into the METADATA.toml file, and use it for other purposes than just the pyright tests. E.g. instead of relying solely on pyright to prevent regressions of "complete" stubs (which doesn't work great, since pyright doesn't understand Incomplete), we could have a separate script in CI.

まず METADATA.toml ファイルと現在の pyright テスト設定を調査し、その後 issue #10722 のコンテキストを確認します。METADATA.toml に関連するスタブ除外情報と不完全なスタブの情報が表現され、pyright テストやその他の CI チェックをサポートできれば完了です。