[elastalert-server]Compatible with PEP668

[nsano-rururu]

• [ ] Dockerfile
• [ ] src/controllers/process/index.js
• [ ] src/controllers/silence/index.js
• [ ] src/controllers/test/index.js

PEP 668 – Marking Python base environments as “externally managed” https://peps.python.org/pep-0668/ 俺流！PEP668とうまくやっていく方法 https://blog.jp.square-enix.com/iteng-blog/posts/00043-play-with-the-pep668/ virtualenvを用いずに仮想環境に入る https://qiita.com/cielavenir/items/eda6dbdd546d1bcb8311 Ubuntu23.04でPythonのパッケージをインストールしてハマった https://note.com/ueponx/n/n6d1c6314af3e