Bundle dependency requirements with release

We might want to include in the source distribution a locked file of requirements (e.g. requirements.txt file with all the transitive dependencies that were proven to function at the time of publishing). This file is not intended for use by the common user but it is useful, e.g., when we rely on deployments on Kubernetes clusters (especially because when pods die&restart they tend to update dependencies automatically, which can cause mismatches in dependency versions).

This change was introduced for hipscat-import and could be bubbled up to the PPT.

hipscat-import の pull request 381 にある依存関係固定の変更を確認し、次にこの template がソースディストリビューションをどのようにビルドするかを調査してください。確認済みの推移的依存関係を公開されるソースディストリビューションに含める requirements ファイルを追加し、Kubernetes の再起動などのデプロイシナリオで利用できることを検証してください。