[+] Command Generate - Add "delete a list of …" in generated route file

[rap2hpoutre]

This PR has to be merged and released when:

• [x] https://github.com/ForestAdmin/forest-express/pull/346 is merged and forest-express is released (new major: 6)
• [x] AND forest-express-sequelize updates its forest-express dependency to v6
• [x] AND forest-express-sequelize is released (new major: 6)
• [x] AND forest-express-mongoose updates its forest-express dependency to v6
• [x] AND forest-express-mongoose is released (new major: 6)
  • [ ] AND this PR is updated to use forest-express-sequelize and forest-express-mongoose in v6. (EDIT: see: https://github.com/ForestAdmin/lumber/pull/405)

[rap2hpoutre]

(2) Table view select all - Adapt lumber to generate delete Bulk routes