geonetwork: double fix permissions issue

[edevosc2c]

in the geonetwork deployment, the permissions are fixed twice:

• one through an initcontainer: https://github.com/georchestra/helm-georchestra/blob/main/templates/geonetwork/geonetwork-deployment.yaml#L41-L46
• one inside the container: https://github.com/georchestra/geonetwork/blob/georchestra-gn4.2.x/web/src/docker/docker-entrypoint.d/00-adjust-perms

we should only keep one script that fixes the permissions.

I'm for removing it inside the geonetwork docker image because for the official docker compose image the permissions are already set correctly: https://betterstack.com/community/questions/what-is-the-best-way-to-manage-permissions-for-docker-shared-volumes/#use-named-volumes