Update to generator-jhipster v8.7.3

[mshima]

Update to latest JHipster version.

Like jhipster/generator-jhipster#27764 nodejs uses a different structure.

Node blueprint uses workspaces.
A workspace (folder with package.json) for client and another for server.
A root package.json with prettier and scripts.

• Eslint should be updated to v9 (mandatory since server is a node package too).
• main generator may need adjusts to make it compatible with nodejs structure.

[mshima]

@DanielFran bug bounty claim https://opencollective.com/generator-jhipster/expenses/228475

[DanielFran]

@mshima approved